GLM-5.2 can now be run locally! The 2-bit model retains ~82% accuracy after we shrunk it from 1.51TB to 238GB (-84% size). Run on a 256GB Mac or RAM/VRAM setups. GLM-5.2 is the strongest open model to date. Guide: https://unsloth.ai/docs/models/glm-5.2… GGUF: https://huggingface.co/unsloth/GLM-5.2-GGUF…

GLM-5.2 - How to Run Locally | Unsloth Documentation

Source: https://unsloth.ai/docs/models/glm-5.2 For the complete documentation index, seellms.txt. This page is also available asMarkdown.

1. Models

GLM-5.2 - How to Run Locally

Run the new GLM-5.2 model by Z.ai on local hardware!

GLM-5.2 is Z.ai’s new open model, delivering SOTA performance across long-horizon coding, reasoning, and agentic tasks. With744B parameters, 40B active parameters, and a1M contextwindow, it can now be run locally usingUnsloth DynamicGGUFs. GLM-5.2 is thestrongest open modelto date, performing on par with Claude 4.8 Opus, GPT-5.5, and Gemini 3.1 Pro across Artificial Analysis and many other benchmarks.

The full model requires1.51TBof disk space, while Unsloth Dynamic 2-bit GGUF reduces this to239GB (-84% size)byupcasting important layers to 8 or 16-bit. Dynamic 1-bit lowers further to217GB (-86%). Thanks Z.ai for giving Unsloth day-zero access.GLM-5.2-GGUF

Run GLM-5.2 TutorialsQuantization Results

The 2-bit dynamic quantUD\-IQ2\_Muses239GBof disk space - this can directly fit on a256GB unified memory Macand works well in a1x24GB GPUand256GB of RAMwith MoE offloading. The1-bitquant will fit on a 223GB RAM and 8-bit requires 810GB RAM.

Table: Inference hardware requirements(units = total memory: RAM + VRAM, or unified memory)

For best performance, make sure your total available memory, including VRAM and system RAM, exceeds the quantized model file size by a comfortable margin.

GLM-5.2 has3 thinking modes. Non-thinking and Thinking in two modes:High+Max. Use Max Thinking for complicated tasks. InUnsloth Studioyou can easily toggle High + Max Thinking and non-Thinking with a UI.

Use these settings for most use cases:

Default Settings (Most Tasks)

• Maximum context window:1,048,576.

GLM 5.2 uses thinking mode by default. And supportsreasoning\_effortas “high”, “max” or disabled thinking. To disable thinking, use\-\-chat\-template\-kwargs '\{"enable\_thinking":false\}'

If you’re onWindowsPowershell, use:\-\-chat\-template\-kwargs "\{\\"enable\_thinking\\":false\}"

Use ‘true’ and ‘false’ interchangeably.

You can also use\-\-reasoning onor\-\-reasoning offin llama.cpp as well now!

We also ran KLD (KL Divergence) to gauge the accuracy of our quantizations of GLM-5.2-GGUF. In general, dynamic 4-bit UD-Q4_K_XL and dynamic 5-bit UD-Q5_K_XL are generally lossless, and smaller quants also work great!

On pure top-1% accuracy,dynamic 1-bit gets around 76.2% accuracy yet being 86% smaller! Dynamic 2-bit gets around 82% accuracy whilst being 84% smaller.

99.9% KLD is also generally good - there is a larger uplift from 4bit onwards though, so for massive out of distribution tasks, dynamic 4-bit is probably best.

The mean KLD generally follows a clear monotonic trend vs disk space, and shows even at 1-bit GLM 5.2 works well!

You can now run GLM-5.2 inllama.cppandUnsloth Studio. We will be utilizing the 239GBUD\-IQ2\_Mquant for best results in terms of accessbility and accuracy.

🦥 Run GLM-5.2 in Unsloth Studio

GLM-5.2 can run inUnsloth Studio, an open-source web UI for local AI.Unsloth Studio automatically offloads to RAM and detects multiGPU setups. With Unsloth Studio, you can run models locally onMacOS, Windows, Linux and:

• Search, download,run GGUFsand safetensor models
• Fast CPU + GPU inference via llama.cpp

Install and Launch Unsloth

To install, run in your terminal:

MacOS, Linux, WSL:

Windows PowerShell:

Launch Unsloth

MacOS, Linux, WSL and Windows:

Then openhttp://127\.0\.0\.1:8888(or your specific URL) in your browser.

Launch Unsloth securely with HTTPS and Cloudflare

**NEW!**Unsloth now provides a secure way to launch Studio over HTTPS through a free Cloudflare tunnel. Use the below (works in Windows, Mac & Linux):

Search and download GLM-5.2

Unsloth Studio automatically offloads to RAM and detects multiGPU setups. On first launch you will need to create a password to secure your account and sign in again later.

Then go to theStudio Chattab and search forGLM-5.2in the search bar and download your desired model and quant. Ensure you have enough compute the run the model.

Run GLM-5.2

Inference parameters should be auto-set when using Unsloth Studio, however you can still change it manually. You can also edit the context length, chat template and other settings.

For more information, you can view ourUnsloth Studio inference guide.

Example of Qwen3.6 running with tool-calling

🦙 Run GLM-5.2 in llama.cpp

For this guide we’ll be running theUD\-IQ2\_Mquant which will require at least 245GB RAM. Feel free to change quantization type. For these tutorials, we will usingllama.cppfor fast local inference. GGUF:GLM-5.2-GGUF

Obtain the latestllama\.cpponGitHub here. You can follow the build instructions below as well. Change\-DGGML\_CUDA=ONto\-DGGML\_CUDA=OFFif you don’t have a GPU or just want CPU inference.For Apple Mac / Metal devices, set\-DGGML\_CUDA=OFFthen continue as usual - Metal support is on by default.

You can now usellama\.cppdirectly to load and download models, just likeollama run. First, select the quantization type you want likeUD\-IQ2\_M. Also useexport LLAMA\_CACHE="unsloth/GLM\-5\.2\-GGUF"to forcellama\.cppto save to a specific location.Note this download process might be very slow, so it’s probably best to use the manual download process in the next section.

If you want to download the model manually**(much faster!)**, we can download the model via the code below (after installingpip install huggingface\_hub). If downloads get stuck, see:Hugging Face Hub, XET debugging

If you want to use the dynamic 1bit, then do:

Then run the model in conversation mode. Useunsloth/GLM\-5\.2\-GGUF/UD\-IQ2\_M/GLM\-5\.2\-UD\-IQ2\_M\-00001\-of\-00006\.gguffor 2bit orunsloth/GLM\-5\.2\-GGUF/UD\-IQ1\_S/GLM\-5\.2\-UD\-IQ1\_S\-00001\-of\-00006\.gguffor 1bit.

When you launch llama-cli, you will see:

Then after prompting it to make a short Flappy Bird game, we get:

With the full conversation and game below:

Full game in HTMLhttps://unsloth.ai/docs/models/glm-5.2#full-game-in-htmlFull conversationhttps://unsloth.ai/docs/models/glm-5.2#full-conversationAnd the game has sound and works wonderfully! Reminder this was a 1-bit quantization and it worked well!

📐Long context via KV Cache quantization

To utilize long context in llama.cpp, we need to employ KV cache quantization to reduce memory usage. Recently llama.cpp added higher accuracy tricks to KV cache quantization -seeand other PRs!

Currently, these KV cache dtypes are supported:

By defaultf16is used. If you useq4\_0which is around 4.5 bits per weight, you can extend around 16 / 4.5 =3.5x longer context lengths! So if you model used to support 10K, 35K can be in reach!q4\_1is probably better since you also get a shifting parameter, and is 5 bits per weight - so 3.2x longer contexts.

Use it like below:

You can view further below for GLM-5.2 benchmarks in table format:

Terminal Bench 2.1 (Terminus-2)

Terminal Bench 2.1 (Best Reported Harness)

• Recommended Settings
• 📈 Quantization analysis
• Run GLM-5.2 Tutorials:
• 🦥 Run GLM-5.2 in Unsloth Studio
• 🦙 Run GLM-5.2 in llama.cpp
• 📐Long context via KV Cache quantization
• 📊 Benchmarks

curl -fsSL https://unsloth.ai/install.sh | sh

irm https://unsloth.ai/install.ps1 | iex

unsloth studio -H 0.0.0.0 -p 8888

apt-get update
apt-get install pciutils build-essential cmake curl libcurl4-openssl-dev -y
git clone https://github.com/ggml-org/llama.cpp
cmake llama.cpp -B llama.cpp/build \
    -DBUILD_SHARED_LIBS=OFF -DGGML_CUDA=ON
cmake --build llama.cpp/build --config Release -j --clean-first --target llama-cli llama-mtmd-cli llama-server llama-gguf-split
cp llama.cpp/build/bin/llama-* llama.cpp

export LLAMA_CACHE="unsloth/GLM-5.2-GGUF"
./llama.cpp/llama-cli \
    -hf unsloth/GLM-5.2-GGUF:UD-IQ2_M \
    --temp 1.0 \
    --top-p 0.95 \
    --min-p 0.01

hf download unsloth/GLM-5.2-GGUF \
    --local-dir unsloth/GLM-5.2-GGUF \
    --include "*UD-IQ2_M*" # Use "*UD-Q8_K_XL*" for near full precision

hf download unsloth/GLM-5.2-GGUF \
    --local-dir unsloth/GLM-5.2-GGUF \
    --include "*UD-IQ1_S*"

./llama.cpp/llama-cli \
    --model unsloth/GLM-5.2-GGUF/UD-IQ2_M/GLM-5.2-UD-IQ2_M-00001-of-00006.gguf \
    --temp 1.0 \
    --top-p 0.95 \
    --min-p 0.01/

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<title>Sunset Flier</title>
<link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&family=Fred:wght@400;700&display=swap" rel="stylesheet">
<style>
  :root {
    --sunset-1: #ff6b6b;
    --sunset-2: #feca50;
    --sunset-3: #ff9ff3;
    --dusk: #36306b;
    --night: #1a1746;
    --accent: #ffd93b;
    --coral: #ff6b6b;
    --pipe: #4a902b;
    --pipe-dark: #2d5a1a;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    background: var(--night);
    font-family: 'Fred', sans-serif;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
  }

  #game-wrap {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(180deg, #1a1746 0%, #36306b 40%, #ff6b6b 70%, #feca50 100%);
  }

  #game-frame {
    position: relative;
    width: min(100vw, 480px);
    height: min(100vh, 720px);
    max-height: 100vh;
    box-shadow: 0 30px 80px rgba(0,0,0,0.6), inset 0 0 0 1px rgba(255,255,255,0.05);
    overflow: hidden;
    background: linear-gradient(180deg, #4a3a8e 0%, #ff6b6b 60%, #feca50 100%);
  }

  canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
  }

  .overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.3s ease;
  }

  .overlay.hidden {
    opacity: 0;
    pointer-events: none;
  }

  .overlay.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .panel {
    background: rgba(26, 23, 70, 0.85);
    border: 3px solid var(--accent);
    border-radius: 16px;
    padding: 28px 36px;
    text-align: center;
    color: #fff;
    box-shadow: 0 12px 0 rgba(0,0,0,0.3), 0 0 40px rgba(255, 217, 59, 0.4);
    backdrop-filter: blur(4px);
    transform: translateY(0);
    animation: bob 3s ease-in-out infinite;
  }

  @keyframes bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
  }

  .title {
    font-family: 'Press Start 2P', monospace;
    font-size: 26px;
    color: var(--accent);
    text-shadow: 3px 3px 0 #b87c0a, 6px 6px 0 rgba(0,0,0,0.3);
    letter-spacing: 1px;
    margin-bottom: 6px;
    line-height: 1.3;
  }

  .subtitle {
    font-size: 14px;
    color: #ffe8a8;
    margin-bottom: 20px;
    font-weight: 700;
  }

  .tap-icon {
    font-size: 42px;
    margin: 8px 0;
    animation: tap 1.2s ease-in-out infinite;
  }

  @keyframes tap {
    0%, 50% { transform: translateY(0) scale(1); }
    20% { transform: translateY(-8px) scale(1.1); }
  }

  .instructions {
    font-size: 13px;
    color: #fff;
    opacity: 0.85;
    margin-top: 10px;
    font-weight: 400;
  }

  .score-row {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin: 12px 0 20px;
  }

  .score-box {
    background: rgba(0,0,0,0.4);
    border: 2px solid var(--accent);
    border-radius: 10px;
    padding: 10px 18px;
    min-width: 80px;
  }

  .score-box .label {
    font-family: 'Press Start 2p', monospace;
    font-size: 9px;
    color: var(--accent);
    margin-bottom: 4px;
    letter-spacing: 1px;
  }

  .score-box .value {
    font-family: 'Press Start 2p', monospace;
    font-size: 18px;
    color: #fff;
  }

  .score-box.best .value { color: var(--coral); }

  .btn {
    font-family: 'Press Start 2p', monospace;
    font-size: 12px;
    color: var(--night);
    background: var(--accent);
    border: none;
    padding: 12px 22px;
    border-radius: 8px;
    cursor: pointer;
    letter-spacing: 1px;
    box-shadow: 0 6px 0 #b87c0a, 0 8px 12px rgba(0,0,0,0.3);
    transition: transform 0.1s, box-shadow 0.1s;
    pointer-events: auto;
  }

  .btn:hover { transform: translateY(2px); box-shadow: 0 4px 0 #b87c0a, 0 6px 10px rgba(0,0,0,0.3); }
  .btn:active { transform: translateY(6px); box-shadow: 0 0 0 #b87c0a, 0 2px 6px rgba(0,0,0,0.3); }

  #hud {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    font-family: 'Press Start 2P', monospace;
    font-size: 36px;
    color: #fff;
    text-shadow: 3px 3px 0 #b87c0a, 5px 5px 0 rgba(0,0,0,0.5);
    pointer-events: none;
    transition: opacity 0.3s;
    opacity: 0;
  }

  #hud.visible { opacity: 1; }

  #hud .new-best {
    font-size: 11px;
    color: var(--coral);
    text-shadow: 2px 2px 0 #000;
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.3s;
  }

  #hud.has-new-best .new-best { opacity: 1; animation: pulse 0.6s ease infinite alternate; }

  @keyframes pulse {
    from { transform: translateX(-50%) scale(1); }
    to { transform: translateX(-50%) scale(1.15); }
  }

  .medal {
    font-family: 'Press Start 2P', monospace;
    font-size: 48px;
    margin: 10px 0;
    text-shadow: 3px 3px 0 #000;
  }

  .flash {
    position: absolute;
    inset: 0;
    background: #fff;
    opacity: 0;
    pointer-events: none;
    z-index: 8;
  }

  .footer {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    color: rgba(255,255,255,0.7);
    font-weight: 400;
    text-align: center;
    pointer-events: none;
    z-index: 9;
  }
</style>
</head>
<body>
<div id="game-wrap">
  <div id="game-frame">
    <canvas id="canvas"></canvas>
    <div id="hud" class="hud">
      <div id="hud-score">0</div>
      <div class="new-best">NEW BEST!</div>
    </div>
    <div id="flash" class="flash"></div>

    <!-- Start screen -->
    <div id="start-screen" class="overlay visible">
      <div class="panel">
        <div class="title">SUNSET<br>FLIER</div>
        <div class="subtitle">— dusk flight —</div>
        <div class="tap-icon">✊</div>
        <div class="instructions">TAP / SPACE / CLICK to flap</div>
      </div>
    </div>

    <!-- Game over screen -->
    <div id="end-screen" class="overlay hidden">
      <div class="panel">
        <div class="title" style="font-size:22px;color:var(--coral);">GAME OVER</div>
        <div id="medal" class="medal" style="display:none;">★</div>
        <div class="score-row">
          <div class="score-box">
            <div class="label">SCORE</div>
            <div class="value" id="end-score">0</div>
          </div>
          <div class="score-box best">
            <div class="label">BEST</div>
            <div class="value" id="end-best">0</div>
          </div>
        </div>
        <button class="btn" id="restart-btn">RETRY</button>
      </div>
    </div>

    <div class="footer">Sound on • Tap to fly</div>
  </div>
</div>

<script>
(() => {
  // ============ Setup ============
  const canvas = document.getElementById('canvas');
  const ctx = canvas.getContext('2d');
  const frame = document.getElementById('game-frame');
  const hud = document.getElementById('hud');
  const hudScore = document.getElementById('hud-score');
  const startScreen = document.getElementById('start-screen');
  const endScreen = document.getElementById('end-screen');
  const endScore = document.getElementById('end-score');
  const endBest = document.getElementById('end-best');
  const medalEl = document.getElementById('medal');
  const flashEl = document.getElementById('flash');
  const restartBtn = document.getElementById('restart-btn');

  let W = 480, H = 720;
  const dpr = window.devicePixelRatio || 1;

  function resize() {
    const rect = frame.getBoundingClientRect();
    W = rect.width;
    H = rect.height;
    canvas.width = W * dpr;
    canvas.height = H * dpr;
    ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
  }
  window.addEventListener('resize', resize);
  resize();

  // ============ Audio (Web Audio API) ============
  let audioCtx = null;
  function getAudio() {
    if (!audioCtx) {
      try { audioCtx = new (window.AudioContext || window.webkitAudioContext)(); }
      catch(e) { audioCtx = null; }
    }
    if (audioCtx && audioCtx.state === 'suspended') audioCtx.resume();
    return audioCtx;
  }

  function beep(freq, dur=0.1, type='square', vol=0.1, slideTo=null) {
    const ac = getAudio();
    if (!ac) return;
    const osc = ac.createOscillator();
    const gain = ac.createGain();
    osc.type = type;
    osc.frequency.value = freq;
    if (slideTo) osc.frequency.linearRampToValueAtTime(slideTo, ac.currentTime + dur);
    gain.gain.value = vol;
    gain.gain.exponentialRampToValueAtTime(0.001, ac.currentTime + dur);
    osc.connect(gain);
    gain.connect(ac.destination);
    osc.start();
    osc.stop(ac.currentTime + dur);
  }

  const sfx = {
    flap: () => beep(420, 0.12, 'square', 0.08, 720),
    score: () => { beep(880, 0.08, 'triangle', 0.12); setTimeout(()=>beep(1320, 0.1, 'triangle', 0.1), 60); },
    hit: () => { beep(180, 0.25, 'sawtooth', 0.15, 60); },
    die: () => { beep(120, 0.5, 'sawtooth', 0.15, 40); }
  };

  // ============ Game State ============
  const STATE = { READY: 0, PLAYING: 1, DYING: 2, OVER: 3 };
  let state = STATE.READY;

  let bird, pipes, particles, score, best, frameCount, shake, groundX, clouds, stars;

  best = parseInt(localStorage.getItem('sunsetFlierBest') || '0', 10) || 0;
  endBest.textContent = best;

  // ============ Bird ============
  function makeBird() {
    return {
      x: W * 0.32,
      y: H * 0.5,
      vy: 0,
      radius: 14,
      wingPhase: 0,
      rotation: 0,
      alive: true
    };
  }

  // ============ Pipes ============
  const PIPE_W = 68;
  const PIPE_GAP = 180;
  const PIPE_SPEED = 2.6;
  const PIPE_SPACING = 220;

  function makePipe(x) {
    const minY = 90;
    const maxY = H - 90 - PIPE_GAP;
    const gapY = minY + Math.random() * (maxY - minY);
    return { x, gapY, scored: false, passed: false };
  }

  function initPipes() {
    pipes = [];
    let x = W + 80;
    for (let i = 0; i < 4; i++) {
      pipes.push(makePipe(x));
      x += PIPE_SPACING;
    }
  }

  // ============ Particles ============
  function spawnParticles(x, y, color, count=10, vel=3) {
    for (let i = 0; i < count; i++) {
      const angle = Math.random() * Math.PI * 2;
      const speed = (Math.random() * 0.6 + 0.4) * vel;
      particles.push({
        x, y,
        vx: Math.cos(angle) * speed,
        vy: Math.sin(angle) * speed - 1,
        life: 1,
        size: Math.random() * 4 + 2,
        color
      });
    }
  }

  // ============ Background ============
  function initBg() {
    clouds = [];
    for (let i = 0; i < 4; i++) {
      clouds.push({
        x: Math.random() * W,
        y: 80 + Math.random() * 180,
        scale: 0.6 + Math.random() * 0.8,
        speed: 0.2 + Math.random() * 0.3
      });
    }
    stars = [];
    for (let i = 0; i < 30; i++) {
      stars.push({
        x: Math.random() * W,
        y: Math.random() * H * 0.4,
        r: Math.random() * 1.5 + 0.3,
        tw: Math.random() * Math.PI * 2
      });
    }
  }

  // ============ Reset / Start ============
  function reset() {
    bird = makeBird();
    pipes = [];
    particles = [];
    score = 0;
    frameCount = 0;
    shake = 0;
    groundX = 0;
    initPipes();
    initBg();
    hudScore.textContent = '0';
    hud.classList.remove('has-new-best');
  }

  function startGame() {
    state = STATE.PLAYING;
    startScreen.classList.add('hidden');
    startScreen.classList.remove('visible');
    hud.classList.add('visible');
    bird.vy = -7.2;
    sfx.flap();
  }

  function gameOver() {
    state = STATE.DYING;
    sfx.hit();
    setTimeout(sfx.die, 120);
    shake = 18;
    spawnParticles(bird.x, bird.y, '#ffd93b', 24, 5);
    spawnParticles(bird.x, bird.y, '#ff6b6b', 16, 4);
    flashScreen();
    bird.alive = false;

    const isNewBest = score > best;
    if (isNewBest) {
      best = score;
      localStorage.setItem('sunsetFlierBest', String(best));
    }

    setTimeout(() => {
      state = STATE.OVER;
      endScore.textContent = score;
      endBest.textContent = best;
      const medal = getMedal(score);
      if (medal) {
        medalEl.style.display = 'block';
        medalEl.textContent = medal.symbol;
        medalEl.style.color = medal.color;
      } else {
        medalEl.style.display = 'none';
      }
      endScreen.classList.remove('hidden');
      endScreen.classList.add('visible');
      if (isNewBest) {
        setTimeout(()=>hud.classList.add('has-new-best'), 0);
      }
    }, 700);
  }

  function flashScreen() {
    flashEl.style.transition = 'none';
    flashEl.style.opacity = '0.9';
    requestAnimationFrame(() => {
      flashEl.style.transition = 'opacity 0.4s ease-out';
      flashEl.style.opacity = '0';
    });
  }

  function getMedal(s) {
    if (s >= 30) return { symbol: '★', color: '#ffd93b' };
    if (s >= 20) return { symbol: '✦', color: '#c0c0c0' };
    if (s >= 10) return { symbol: '✧', color: '#cd7f32' };
    if (s >= 5)  return { symbol: '•', color: '#ff9ff3' };
    return null;
  }

  function restart() {
    reset();
    state = STATE.READY;
    endScreen.classList.add('hidden');
    endScreen.classList.remove('visible');
    startScreen.classList.remove('hidden');
    startScreen.classList.add('visible');
    hud.classList.remove('visible');
    hud.classList.remove('has-new-best');
  }

  // ============ Input ============
  function flap() {
    if (state === STATE.READY) { startGame(); return; }
    if (state === STATE.PLAYING) {
      bird.vy = -7.2;
      bird.wingPhase = 0;
      sfx.flap();
      spawnParticles(bird.x - 8, bird.y + 6, '#fff8d6', 4, 1.5);
    }
    if (state === STATE.OVER) {
      // tap anywhere on end screen also restarts
      // but we let button handle it primarily
    }
  }

  function handleInput(e) {
    if (e.target.closest('button')) return;
    e.preventDefault();
    flap();
  }

  frame.addEventListener('mousedown', handleInput);
  frame.addEventListener('touchstart', handleInput, { passive: false });
  window.addEventListener('keydown', (e) => {
    if (e.code === 'Space' || e.code === 'ArrowUp' || e.code === 'Enter') {
      e.preventDefault();
      if (state === STATE.OVER) restart();
      else flap();
    }
  });
  restartBtn.addEventListener('click', (e) => { e.stopPropagation(); restart(); });

  // ============ Update ============
  const GRAVITY = 0.42;
  const MAX_FALL = 9;

  function update() {
    frameCount++;
    if (state === STATE.READY) {
      // idle bob
      bird.y = H * 0.5 + Math.sin(frameCount * 0.08) * 14;
      bird.wingPhase += 0.2;
      bird.rotation = Math.sin(frameCount * 0.08) * 0.05;
    }

    if (state === STATE.PLAYING) {
      bird.vy += GRAVITY;
      if (bird.vy > MAX_FALL) bird.vy = MAX_FALL;
      bird.y += bird.vy;
      bird.wingPhase += 0.4;
      bird.rotation = Math.max(-0.4, Math.min(1.2, bird.vy * 0.08));

      // Pipes
      for (const p of pipes) {
        p.x -= PIPE_SPEED;
        if (!p.scored && p.x + PIPE_W < bird.x) {
          p.scored = true;
          score++;
          hudScore.textContent = score;
          sfx.score();
          spawnParticles(bird.x, bird.y, '#ffd93b', 8, 2);
        }
      }
      // Remove off-screen pipes, add new
      while (pipes.length > 0 && pipes[0].x + PIPE_W < -10) pipes.shift();
      const last = pipes[pipes.length - 1];
      if (last && last.x < W - PIPE_SPACING) {
        pipes.push(makePipe(last.x + PIPE_SPACING));
      }

      // Collision
      // Ground & ceiling
      const groundY = H - 80;
      if (bird.y + bird.radius > groundY || bird.y - bird.radius < 0) {
        bird.y = Math.max(bird.radius + 1, Math.min(groundY - bird.radius, bird.y));
        gameOver();
        return;
      }
      // Pipes
      for (const p of pipes) {
        if (p.x > bird.x + bird.radius || p.x + PIPE_W < bird.x - bird.radius) continue;
        const top = p.gapY;
        const bottom = p.gapY + PIPE_GAP;
        if (bird.y - bird.radius < top || bird.y + bird.radius > bottom) {
          // collision
          gameOver();
          return;
        }
      }
    }

    if (state === STATE.DYING) {
      bird.vy += GRAVITY * 1.2;
      bird.y += bird.vy;
      bird.rotation += 0.06;
      const groundY = H - 80;
      if (bird.y + bird.radius > groundY) {
        bird.y = groundY - bird.radius;
        bird.vy = 0;
      }
    }

    // Particles
    for (let i = particles.length - 1; i >= 0; i--) {
      const p = particles[i];
      p.x += p.vx;
      p.y += p.vy;
      p.vy += 0.15;
      p.life -= 0.02;
      if (p.life <= 0) particles.splice(i, 1);
    }

    // Shake decay
    if (shake > 0) shake = Math.max(0, shake - 1.2);

    // Background animations
    for (const c of clouds) {
      c.x -= c.speed;
      if (c.x < -100) c.x = W + 100;
    }
    for (const s of stars) {
      s.tw += 0.05;
    }

    groundX = (groundX - PIPE_SPEED) % 120;
  }

  // ============ Render ============
  function render() {
    ctx.save();
    // Shake
    if (shake > 0) {
      const sx = (Math.random() - 0.5) * shake;
      const sy = (Math.random() - 0.5) * shake;
      ctx.translate(sx, sy);
    }

    // Sky gradient
    const sky = ctx.createLinearGradient(0, 0, 0, H);
    sky.addColorStop(0, '#1a1746');
    sky.addColorStop(0.3, '#4a3a8e');
    sky.addColorStop(0.55, '#ff6b6b');
    sky.addColorStop(0.8, '#feca50');
    sky.addColorStop(1, '#ffd93b');
    ctx.fillStyle = sky;
    ctx.fillRect(-20, -20, W + 40, H + 40);

    // Stars
    for (const s of stars) {
      const a = 0.4 + Math.sin(s.tw) * 0.4;
      ctx.fillStyle = `rgba(255,255,255,${a})`;
      ctx.beginPath();
      ctx.arc(s.x, s.y, s.r, 0, Math.PI * 2);
      ctx.fill();
    }

    // Sun
    const sunX = W * 0.75;
    const sunY = H * 0.65;
    const sunGlow = ctx.createRadialGradient(sunX, sunY, 0, sunX, sunY, 180);
    sunGlow.addColorStop(0, 'rgba(255,240,160,0.7)');
    sunGlow.addColorStop(0.4, 'rgba(255,200,120,0.3)');
    sunGlow.addColorStop(1, 'rgba(255,200,120,0)');
    ctx.fillStyle = sunGlow;
    ctx.fillRect(sunX - 200, sunY - 200, 400, 400);

    ctx.fillStyle = '#fff6d0';
    ctx.beginPath();
    ctx.arc(sunX, sunY, 42, 0, Math.PI * 2);
    ctx.fill();

    // Clouds
    for (const c of clouds) {
      drawCloud(c.x, c.y, c.scale);
    }

    // Mountains silhouette
    ctx.fillStyle = 'rgba(40, 30, 80, 0.7)';
    ctx.beginPath();
    ctx.moveTo(0, H * 0.72);
    const peaks = [
      [W * 0.15, H * 0.58],
      [W * 0.25, H * 0.68],
      [W * 0.4, H * 0.52],
      [W * 0.55, H * 0.66],
      [W * 0.7, H * 0.6],
      [W * 0.85, H * 0.68],
      [W, H * 0.62]
    ];
    for (const [px, py] of peaks) ctx.lineTo(px, py);
    ctx.lineTo(W, H);
    ctx.lineTo(0, H);
    ctx.closePath();
    ctx.fill();

    // Pipes
    for (const p of pipes) {
      drawPipe(p);
    }

    // Ground
    drawGround();

    // Bird
    drawBird();

    // Particles
    for (const part of particles) {
      ctx.fillStyle = part.color;
      ctx.globalAlpha = part.life;
      ctx.beginPath();
      ctx.arc(part.x, part.y, part.size, 0, Math.PI * 2);
      ctx.fill();
    }
    ctx.globalAlpha = 1;

    ctx.restore();
  }

  function drawCloud(x, y, scale) {
    ctx.fillStyle = 'rgba(255, 230, 200, 0.85)';
    const s = scale;
    ctx.beginPath();
    ctx.arc(x, y, 18 * s, 0, Math.PI * 2);
    ctx.arc(x + 18 * s, y + 4 * s, 22 * s, 0, Math.PI * 2);
    ctx.arc(x + 38 * s, y, 16 * s, 0, Math.PI * 2);
    ctx.arc(x + 18 * s, y - 6 * s, 14 * s, 0, Math.PI * 2);
    ctx.fill();
  }

  function drawPipe(p) {
    const x = p.x;
    const topY = p.gapY;
    const bottomY = p.gapY + PIPE_GAP;
    const groundY = H - 80;

    // gradient
    const grad = ctx.createLinearGradient(x, 0, x + PIPE_W, 0);
    grad.addColorStop(0, '#2d5a1a');
    grad.addColorStop(0.15, '#4a902b');
    grad.addColorStop(0.5, '#7bc94a');
    grad.addColorStop(0.85, '#4a902b');
    grad.addColorStop(1, '#2d5a1a');

    // Top pipe
    ctx.fillStyle = grad;
    ctx.fillRect(x, 0, PIPE_W, topY - 18);
    // Top cap
    ctx.fillRect(x - 4, topY - 18, PIPE_W + 8, 18);
    // Top cap highlight
    ctx.fillStyle = 'rgba(255,255,255,0.15)';
    ctx.fillRect(x - 4, topY - 18, 14, 18);

    // Bottom pipe
    ctx.fillStyle = grad;
    ctx.fillRect(x, bottomY + 18, PIPE_W, groundY - (bottomY + 18));
    // Bottom cap
    ctx.fillRect(x - 4, bottomY, PIPE_W + 8, 18);
    ctx.fillStyle = 'rgba(255,255,255,0.15)';
    ctx.fillRect(x - 4, bottomY, 14, 18);

    // Outline
    ctx.strokeStyle = '#1c3a0d';
    ctx.lineWidth = 2;
    ctx.strokeRect(x, 0, PIPE_W, topY - 18);
    ctx.strokeRect(x - 4, topY - 18, PIPE_W + 8, 18);
    ctx.strokeRect(x, bottomY + 18, PIPE_W, groundY - (bottomY + 18));
    ctx.strokeRect(x - 4, bottomY, PIPE_W + 8, 18);
  }

  function drawGround() {
    const groundY = H - 80;
    // Sand/dusk ground
    const g = ctx.createLinearGradient(0, groundY, 0, H);
    g.addColorStop(0, '#8b5a2b');
    g.addColorStop(0.4, '#5e3a1c');
    g.addColorStop(1, '#2d1a0c');
    ctx.fillStyle = g;
    ctx.fillRect(0, groundY, W, 80);

    // surface line
    ctx.strokeStyle = '#1c3a0d';
    ctx.lineWidth = 3;
    ctx.beginPath();
    ctx.moveTo(0, groundY);
    ctx.lineTo(W, groundY);
    ctx.stroke();

    // Pattern stripes (moving)
    ctx.fillStyle = 'rgba(0,0,0,0.15)';
    for (let i = -2; i < W / 40 + 2; i++) {
      const stripeX = (i * 80 + groundX + 120) % (W + 80) - 40;
      ctx.beginPath();
      ctx.moveTo(stripeX, groundY);
      ctx.lineTo(stripeX + 30, groundY + 80);
      ctx.lineTo(stripeX + 50, groundY + 80);
      ctx.lineTo(stripeX + 20, groundY);
      ctx.closePath();
      ctx.fill();
    }

    // Pebbles on top
    ctx.fillStyle = '#3d2412';
    for (let i = 0; i < 12; i++) {
      const px = (i * 60 + groundX + 60) % (W + 40);
      ctx.beginPath();
      ctx.arc(px, groundY + 4, 3, 0, Math.PI * 2);
      ctx.fill();
    }
  }

  function drawBird() {
    const b = bird;
    ctx.save();
    ctx.translate(b.x, b.y);
    ctx.rotate(b.rotation);

    // Shadow
    ctx.fillStyle = 'rgba(0,0,0,0.2)';
    ctx.beginPath();
    ctx.ellipse(2, 2, b.radius, b.radius * 0.85, 0, 0, Math.PI * 2);
    ctx.fill();

    // Body
    const bodyGrad = ctx.createRadialGradient(-4, -4, 2, 0, 0, b.radius + 4);
    bodyGrad.addColorStop(0, '#ff9ff3');
    bodyGrad.addColorStop(0.5, '#ff6b6b');
    bodyGrad.addColorStop(1, '#c0334a');
    ctx.fillStyle = bodyGrad;
    ctx.beginPath();
    ctx.ellipse(0, 0, b.radius, b.radius * 0.92, 0, 0, Math.PI * 2);
    ctx.fill();

    // Wing (flapping)
    const wingY = Math.sin(b.wingPhase) * 8;
    ctx.fillStyle = '#ffd93b';
    ctx.beginPath();
    ctx.ellipse(-4, 4 + wingY, 9, 5, -0.4 + wingY * 0.05, 0, Math.PI * 2);
    ctx.fill();
    ctx.strokeStyle = '#b87c0a';
    ctx.lineWidth = 1.5;
    ctx.stroke();

    // Eye
    ctx.fillStyle = '#fff';
    ctx.beginPath();
    ctx.arc(8, -4, 5, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#1a1746';
    ctx.beginPath();
    ctx.arc(9.5, -4, 2.5, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#fff';
    ctx.beginPath();
    ctx.arc(10, -5, 1, 0, Math.PI * 2);
    ctx.fill();

    // Beak
    ctx.fillStyle = '#ffaa33';
    ctx.beginPath();
    ctx.moveTo(13, -1);
    ctx.lineTo(20, 1);
    ctx.lineTo(13, 3);
    ctx.closePath();
    ctx.fill();
    ctx.strokeStyle = '#b87c0a';
    ctx.lineWidth = 1;
    ctx.stroke();

    // Tail
    ctx.fillStyle = '#ffd93b';
    ctx.beginPath();
    ctx.moveTo(-12, -2);
    ctx.lineTo(-18, -5);
    ctx.lineTo(-16, 0);
    ctx.lineTo(-18, 5);
    ctx.lineTo(-12, 3);
    ctx.closePath();
    ctx.fill();
    ctx.stroke();

    ctx.restore();
  }

  // ============ Loop ============
  function loop() {
    update();
    render();
    requestAnimationFrame(loop);
  }

  reset();
  loop();
})();
</script>
</body>
</html>

[Start thinking]
The user wants a short Flappy Bird game. I'll create a complete, self-contained HTML file with:

1. A classic Flappy Bird-style game
2. Nice graphics and animations
3. Score tracking
4. Game over screen
5. Restart functionality
6. Good physics (gravity, jump mechanics)
7. Pipes that move and are randomly placed
8. Sound effects (using Web Audio API for tones)
9. A nice visual style - I'll avoid the classic yellow bird and use a more interesting color scheme

Let me design this with:
- A nice gradient sky background
- Animated bird with flapping wings
- Pipes with a nice green/metallic look
- Score display
- Start screen, playing state, game over state
- High score tracking with localStorage
- Particle effects when scoring
- Smooth animations

I'll use a sunset/dusk color palette to make it distinctive - warm oranges and purples, with the bird being a warm coral/red color.

Let me code this up carefully:

Key features:
- Canvas-based rendering
- requestAnimationFrame game loop
- Bird physics: gravity, jump impulse
- Pipe generation: random gaps, moving left
- Collision detection
- Score increment when passing pipes
- Particle effects on score
- Death animation
- localStorage for high score
- Sound effects via Web Audio API
- Mobile/touch support
- Clean, polished UI overlay

Let me write the code.
[End thinking]

I'll create a polished Flappy Bird game with a distinctive dusk/sunset aesthetic, smooth physics, particle effects, and sound.

```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<title>Sunset Flier</title>
<link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&family=Fred:wght@400;700&display=swap" rel="stylesheet">
<style>
  :root {
    --sunset-1: #ff6b6b;
    --sunset-2: #feca50;
    --sunset-3: #ff9ff3;
    --dusk: #36306b;
    --night: #1a1746;
    --accent: #ffd93b;
    --coral: #ff6b6b;
    --pipe: #4a902b;
    --pipe-dark: #2d5a1a;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    background: var(--night);
    font-family: 'Fred', sans-serif;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
  }

  #game-wrap {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(180deg, #1a1746 0%, #36306b 40%, #ff6b6b 70%, #feca50 100%);
  }

  #game-frame {
    position: relative;
    width: min(100vw, 480px);
    height: min(100vh, 720px);
    max-height: 100vh;
    box-shadow: 0 30px 80px rgba(0,0,0,0.6), inset 0 0 0 1px rgba(255,255,255,0.05);
    overflow: hidden;
    background: linear-gradient(180deg, #4a3a8e 0%, #ff6b6b 60%, #feca50 100%);
  }

  canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
  }

  .overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.3s ease;
  }

  .overlay.hidden {
    opacity: 0;
    pointer-events: none;
  }

  .overlay.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .panel {
    background: rgba(26, 23, 70, 0.85);
    border: 3px solid var(--accent);
    border-radius: 16px;
    padding: 28px 36px;
    text-align: center;
    color: #fff;
    box-shadow: 0 12px 0 rgba(0,0,0,0.3), 0 0 40px rgba(255, 217, 59, 0.4);
    backdrop-filter: blur(4px);
    transform: translateY(0);
    animation: bob 3s ease-in-out infinite;
  }

  @keyframes bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
  }

  .title {
    font-family: 'Press Start 2P', monospace;
    font-size: 26px;
    color: var(--accent);
    text-shadow: 3px 3px 0 #b87c0a, 6px 6px 0 rgba(0,0,0,0.3);
    letter-spacing: 1px;
    margin-bottom: 6px;
    line-height: 1.3;
  }

  .subtitle {
    font-size: 14px;
    color: #ffe8a8;
    margin-bottom: 20px;
    font-weight: 700;
  }

  .tap-icon {
    font-size: 42px;
    margin: 8px 0;
    animation: tap 1.2s ease-in-out infinite;
  }

  @keyframes tap {
    0%, 50% { transform: translateY(0) scale(1); }
    20% { transform: translateY(-8px) scale(1.1); }
  }

  .instructions {
    font-size: 13px;
    color: #fff;
    opacity: 0.85;
    margin-top: 10px;
    font-weight: 400;
  }

  .score-row {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin: 12px 0 20px;
  }

  .score-box {
    background: rgba(0,0,0,0.4);
    border: 2px solid var(--accent);
    border-radius: 10px;
    padding: 10px 18px;
    min-width: 80px;
  }

  .score-box .label {
    font-family: 'Press Start 2p', monospace;
    font-size: 9px;
    color: var(--accent);
    margin-bottom: 4px;
    letter-spacing: 1px;
  }

  .score-box .value {
    font-family: 'Press Start 2p', monospace;
    font-size: 18px;
    color: #fff;
  }

  .score-box.best .value { color: var(--coral); }

  .btn {
    font-family: 'Press Start 2p', monospace;
    font-size: 12px;
    color: var(--night);
    background: var(--accent);
    border: none;
    padding: 12px 22px;
    border-radius: 8px;
    cursor: pointer;
    letter-spacing: 1px;
    box-shadow: 0 6px 0 #b87c0a, 0 8px 12px rgba(0,0,0,0.3);
    transition: transform 0.1s, box-shadow 0.1s;
    pointer-events: auto;
  }

  .btn:hover { transform: translateY(2px); box-shadow: 0 4px 0 #b87c0a, 0 6px 10px rgba(0,0,0,0.3); }
  .btn:active { transform: translateY(6px); box-shadow: 0 0 0 #b87c0a, 0 2px 6px rgba(0,0,0,0.3); }

  #hud {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    font-family: 'Press Start 2P', monospace;
    font-size: 36px;
    color: #fff;
    text-shadow: 3px 3px 0 #b87c0a, 5px 5px 0 rgba(0,0,0,0.5);
    pointer-events: none;
    transition: opacity 0.3s;
    opacity: 0;
  }

  #hud.visible { opacity: 1; }

  #hud .new-best {
    font-size: 11px;
    color: var(--coral);
    text-shadow: 2px 2px 0 #000;
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.3s;
  }

  #hud.has-new-best .new-best { opacity: 1; animation: pulse 0.6s ease infinite alternate; }

  @keyframes pulse {
    from { transform: translateX(-50%) scale(1); }
    to { transform: translateX(-50%) scale(1.15); }
  }

  .medal {
    font-family: 'Press Start 2P', monospace;
    font-size: 48px;
    margin: 10px 0;
    text-shadow: 3px 3px 0 #000;
  }

  .flash {
    position: absolute;
    inset: 0;
    background: #fff;
    opacity: 0;
    pointer-events: none;
    z-index: 8;
  }

  .footer {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    color: rgba(255,255,255,0.7);
    font-weight: 400;
    text-align: center;
    pointer-events: none;
    z-index: 9;
  }
</style>
</head>
<body>
<div id="game-wrap">
  <div id="game-frame">
    <canvas id="canvas"></canvas>
    <div id="hud" class="hud">
      <div id="hud-score">0</div>
      <div class="new-best">NEW BEST!</div>
    </div>
    <div id="flash" class="flash"></div>

    <!-- Start screen -->
    <div id="start-screen" class="overlay visible">
      <div class="panel">
        <div class="title">SUNSET<br>FLIER</div>
        <div class="subtitle">— dusk flight —</div>
        <div class="tap-icon">✊</div>
        <div class="instructions">TAP / SPACE / CLICK to flap</div>
      </div>
    </div>

    <!-- Game over screen -->
    <div id="end-screen" class="overlay hidden">
      <div class="panel">
        <div class="title" style="font-size:22px;color:var(--coral);">GAME OVER</div>
        <div id="medal" class="medal" style="display:none;">★</div>
        <div class="score-row">
          <div class="score-box">
            <div class="label">SCORE</div>
            <div class="value" id="end-score">0</div>
          </div>
          <div class="score-box best">
            <div class="label">BEST</div>
            <div class="value" id="end-best">0</div>
          </div>
        </div>
        <button class="btn" id="restart-btn">RETRY</button>
      </div>
    </div>

    <div class="footer">Sound on • Tap to fly</div>
  </div>
</div>

<script>
(() => {
  // ============ Setup ============
  const canvas = document.getElementById('canvas');
  const ctx = canvas.getContext('2d');
  const frame = document.getElementById('game-frame');
  const hud = document.getElementById('hud');
  const hudScore = document.getElementById('hud-score');
  const startScreen = document.getElementById('start-screen');
  const endScreen = document.getElementById('end-screen');
  const endScore = document.getElementById('end-score');
  const endBest = document.getElementById('end-best');
  const medalEl = document.getElementById('medal');
  const flashEl = document.getElementById('flash');
  const restartBtn = document.getElementById('restart-btn');

  let W = 480, H = 720;
  const dpr = window.devicePixelRatio || 1;

  function resize() {
    const rect = frame.getBoundingClientRect();
    W = rect.width;
    H = rect.height;
    canvas.width = W * dpr;
    canvas.height = H * dpr;
    ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
  }
  window.addEventListener('resize', resize);
  resize();

  // ============ Audio (Web Audio API) ============
  let audioCtx = null;
  function getAudio() {
    if (!audioCtx) {
      try { audioCtx = new (window.AudioContext || window.webkitAudioContext)(); }
      catch(e) { audioCtx = null; }
    }
    if (audioCtx && audioCtx.state === 'suspended') audioCtx.resume();
    return audioCtx;
  }

  function beep(freq, dur=0.1, type='square', vol=0.1, slideTo=null) {
    const ac = getAudio();
    if (!ac) return;
    const osc = ac.createOscillator();
    const gain = ac.createGain();
    osc.type = type;
    osc.frequency.value = freq;
    if (slideTo) osc.frequency.linearRampToValueAtTime(slideTo, ac.currentTime + dur);
    gain.gain.value = vol;
    gain.gain.exponentialRampToValueAtTime(0.001, ac.currentTime + dur);
    osc.connect(gain);
    gain.connect(ac.destination);
    osc.start();
    osc.stop(ac.currentTime + dur);
  }

  const sfx = {
    flap: () => beep(420, 0.12, 'square', 0.08, 720),
    score: () => { beep(880, 0.08, 'triangle', 0.12); setTimeout(()=>beep(1320, 0.1, 'triangle', 0.1), 60); },
    hit: () => { beep(180, 0.25, 'sawtooth', 0.15, 60); },
    die: () => { beep(120, 0.5, 'sawtooth', 0.15, 40); }
  };

  // ============ Game State ============
  const STATE = { READY: 0, PLAYING: 1, DYING: 2, OVER: 3 };
  let state = STATE.READY;

  let bird, pipes, particles, score, best, frameCount, shake, groundX, clouds, stars;

  best = parseInt(localStorage.getItem('sunsetFlierBest') || '0', 10) || 0;
  endBest.textContent = best;

  // ============ Bird ============
  function makeBird() {
    return {
      x: W * 0.32,
      y: H * 0.5,
      vy: 0,
      radius: 14,
      wingPhase: 0,
      rotation: 0,
      alive: true
    };
  }

  // ============ Pipes ============
  const PIPE_W = 68;
  const PIPE_GAP = 180;
  const PIPE_SPEED = 2.6;
  const PIPE_SPACING = 220;

  function makePipe(x) {
    const minY = 90;
    const maxY = H - 90 - PIPE_GAP;
    const gapY = minY + Math.random() * (maxY - minY);
    return { x, gapY, scored: false, passed: false };
  }

  function initPipes() {
    pipes = [];
    let x = W + 80;
    for (let i = 0; i < 4; i++) {
      pipes.push(makePipe(x));
      x += PIPE_SPACING;
    }
  }

  // ============ Particles ============
  function spawnParticles(x, y, color, count=10, vel=3) {
    for (let i = 0; i < count; i++) {
      const angle = Math.random() * Math.PI * 2;
      const speed = (Math.random() * 0.6 + 0.4) * vel;
      particles.push({
        x, y,
        vx: Math.cos(angle) * speed,
        vy: Math.sin(angle) * speed - 1,
        life: 1,
        size: Math.random() * 4 + 2,
        color
      });
    }
  }

  // ============ Background ============
  function initBg() {
    clouds = [];
    for (let i = 0; i < 4; i++) {
      clouds.push({
        x: Math.random() * W,
        y: 80 + Math.random() * 180,
        scale: 0.6 + Math.random() * 0.8,
        speed: 0.2 + Math.random() * 0.3
      });
    }
    stars = [];
    for (let i = 0; i < 30; i++) {
      stars.push({
        x: Math.random() * W,
        y: Math.random() * H * 0.4,
        r: Math.random() * 1.5 + 0.3,
        tw: Math.random() * Math.PI * 2
      });
    }
  }

  // ============ Reset / Start ============
  function reset() {
    bird = makeBird();
    pipes = [];
    particles = [];
    score = 0;
    frameCount = 0;
    shake = 0;
    groundX = 0;
    initPipes();
    initBg();
    hudScore.textContent = '0';
    hud.classList.remove('has-new-best');
  }

  function startGame() {
    state = STATE.PLAYING;
    startScreen.classList.add('hidden');
    startScreen.classList.remove('visible');
    hud.classList.add('visible');
    bird.vy = -7.2;
    sfx.flap();
  }

  function gameOver() {
    state = STATE.DYING;
    sfx.hit();
    setTimeout(sfx.die, 120);
    shake = 18;
    spawnParticles(bird.x, bird.y, '#ffd93b', 24, 5);
    spawnParticles(bird.x, bird.y, '#ff6b6b', 16, 4);
    flashScreen();
    bird.alive = false;

    const isNewBest = score > best;
    if (isNewBest) {
      best = score;
      localStorage.setItem('sunsetFlierBest', String(best));
    }

    setTimeout(() => {
      state = STATE.OVER;
      endScore.textContent = score;
      endBest.textContent = best;
      const medal = getMedal(score);
      if (medal) {
        medalEl.style.display = 'block';
        medalEl.textContent = medal.symbol;
        medalEl.style.color = medal.color;
      } else {
        medalEl.style.display = 'none';
      }
      endScreen.classList.remove('hidden');
      endScreen.classList.add('visible');
      if (isNewBest) {
        setTimeout(()=>hud.classList.add('has-new-best'), 0);
      }
    }, 700);
  }

  function flashScreen() {
    flashEl.style.transition = 'none';
    flashEl.style.opacity = '0.9';
    requestAnimationFrame(() => {
      flashEl.style.transition = 'opacity 0.4s ease-out';
      flashEl.style.opacity = '0';
    });
  }

  function getMedal(s) {
    if (s >= 30) return { symbol: '★', color: '#ffd93b' };
    if (s >= 20) return { symbol: '✦', color: '#c0c0c0' };
    if (s >= 10) return { symbol: '✧', color: '#cd7f32' };
    if (s >= 5)  return { symbol: '•', color: '#ff9ff3' };
    return null;
  }

  function restart() {
    reset();
    state = STATE.READY;
    endScreen.classList.add('hidden');
    endScreen.classList.remove('visible');
    startScreen.classList.remove('hidden');
    startScreen.classList.add('visible');
    hud.classList.remove('visible');
    hud.classList.remove('has-new-best');
  }

  // ============ Input ============
  function flap() {
    if (state === STATE.READY) { startGame(); return; }
    if (state === STATE.PLAYING) {
      bird.vy = -7.2;
      bird.wingPhase = 0;
      sfx.flap();
      spawnParticles(bird.x - 8, bird.y + 6, '#fff8d6', 4, 1.5);
    }
    if (state === STATE.OVER) {
      // tap anywhere on end screen also restarts
      // but we let button handle it primarily
    }
  }

  function handleInput(e) {
    if (e.target.closest('button')) return;
    e.preventDefault();
    flap();
  }

  frame.addEventListener('mousedown', handleInput);
  frame.addEventListener('touchstart', handleInput, { passive: false });
  window.addEventListener('keydown', (e) => {
    if (e.code === 'Space' || e.code === 'ArrowUp' || e.code === 'Enter') {
      e.preventDefault();
      if (state === STATE.OVER) restart();
      else flap();
    }
  });
  restartBtn.addEventListener('click', (e) => { e.stopPropagation(); restart(); });

  // ============ Update ============
  const GRAVITY = 0.42;
  const MAX_FALL = 9;

  function update() {
    frameCount++;
    if (state === STATE.READY) {
      // idle bob
      bird.y = H * 0.5 + Math.sin(frameCount * 0.08) * 14;
      bird.wingPhase += 0.2;
      bird.rotation = Math.sin(frameCount * 0.08) * 0.05;
    }

    if (state === STATE.PLAYING) {
      bird.vy += GRAVITY;
      if (bird.vy > MAX_FALL) bird.vy = MAX_FALL;
      bird.y += bird.vy;
      bird.wingPhase += 0.4;
      bird.rotation = Math.max(-0.4, Math.min(1.2, bird.vy * 0.08));

      // Pipes
      for (const p of pipes) {
        p.x -= PIPE_SPEED;
        if (!p.scored && p.x + PIPE_W < bird.x) {
          p.scored = true;
          score++;
          hudScore.textContent = score;
          sfx.score();
          spawnParticles(bird.x, bird.y, '#ffd93b', 8, 2);
        }
      }
      // Remove off-screen pipes, add new
      while (pipes.length > 0 && pipes[0].x + PIPE_W < -10) pipes.shift();
      const last = pipes[pipes.length - 1];
      if (last && last.x < W - PIPE_SPACING) {
        pipes.push(makePipe(last.x + PIPE_SPACING));
      }

      // Collision
      // Ground & ceiling
      const groundY = H - 80;
      if (bird.y + bird.radius > groundY || bird.y - bird.radius < 0) {
        bird.y = Math.max(bird.radius + 1, Math.min(groundY - bird.radius, bird.y));
        gameOver();
        return;
      }
      // Pipes
      for (const p of pipes) {
        if (p.x > bird.x + bird.radius || p.x + PIPE_W < bird.x - bird.radius) continue;
        const top = p.gapY;
        const bottom = p.gapY + PIPE_GAP;
        if (bird.y - bird.radius < top || bird.y + bird.radius > bottom) {
          // collision
          gameOver();
          return;
        }
      }
    }

    if (state === STATE.DYING) {
      bird.vy += GRAVITY * 1.2;
      bird.y += bird.vy;
      bird.rotation += 0.06;
      const groundY = H - 80;
      if (bird.y + bird.radius > groundY) {
        bird.y = groundY - bird.radius;
        bird.vy = 0;
      }
    }

    // Particles
    for (let i = particles.length - 1; i >= 0; i--) {
      const p = particles[i];
      p.x += p.vx;
      p.y += p.vy;
      p.vy += 0.15;
      p.life -= 0.02;
      if (p.life <= 0) particles.splice(i, 1);
    }

    // Shake decay
    if (shake > 0) shake = Math.max(0, shake - 1.2);

    // Background animations
    for (const c of clouds) {
      c.x -= c.speed;
      if (c.x < -100) c.x = W + 100;
    }
    for (const s of stars) {
      s.tw += 0.05;
    }

    groundX = (groundX - PIPE_SPEED) % 120;
  }

  // ============ Render ============
  function render() {
    ctx.save();
    // Shake
    if (shake > 0) {
      const sx = (Math.random() - 0.5) * shake;
      const sy = (Math.random() - 0.5) * shake;
      ctx.translate(sx, sy);
    }

    // Sky gradient
    const sky = ctx.createLinearGradient(0, 0, 0, H);
    sky.addColorStop(0, '#1a1746');
    sky.addColorStop(0.3, '#4a3a8e');
    sky.addColorStop(0.55, '#ff6b6b');
    sky.addColorStop(0.8, '#feca50');
    sky.addColorStop(1, '#ffd93b');
    ctx.fillStyle = sky;
    ctx.fillRect(-20, -20, W + 40, H + 40);

    // Stars
    for (const s of stars) {
      const a = 0.4 + Math.sin(s.tw) * 0.4;
      ctx.fillStyle = `rgba(255,255,255,${a})`;
      ctx.beginPath();
      ctx.arc(s.x, s.y, s.r, 0, Math.PI * 2);
      ctx.fill();
    }

    // Sun
    const sunX = W * 0.75;
    const sunY = H * 0.65;
    const sunGlow = ctx.createRadialGradient(sunX, sunY, 0, sunX, sunY, 180);
    sunGlow.addColorStop(0, 'rgba(255,240,160,0.7)');
    sunGlow.addColorStop(0.4, 'rgba(255,200,120,0.3)');
    sunGlow.addColorStop(1, 'rgba(255,200,120,0)');
    ctx.fillStyle = sunGlow;
    ctx.fillRect(sunX - 200, sunY - 200, 400, 400);

    ctx.fillStyle = '#fff6d0';
    ctx.beginPath();
    ctx.arc(sunX, sunY, 42, 0, Math.PI * 2);
    ctx.fill();

    // Clouds
    for (const c of clouds) {
      drawCloud(c.x, c.y, c.scale);
    }

    // Mountains silhouette
    ctx.fillStyle = 'rgba(40, 30, 80, 0.7)';
    ctx.beginPath();
    ctx.moveTo(0, H * 0.72);
    const peaks = [
      [W * 0.15, H * 0.58],
      [W * 0.25, H * 0.68],
      [W * 0.4, H * 0.52],
      [W * 0.55, H * 0.66],
      [W * 0.7, H * 0.6],
      [W * 0.85, H * 0.68],
      [W, H * 0.62]
    ];
    for (const [px, py] of peaks) ctx.lineTo(px, py);
    ctx.lineTo(W, H);
    ctx.lineTo(0, H);
    ctx.closePath();
    ctx.fill();

    // Pipes
    for (const p of pipes) {
      drawPipe(p);
    }

    // Ground
    drawGround();

    // Bird
    drawBird();

    // Particles
    for (const part of particles) {
      ctx.fillStyle = part.color;
      ctx.globalAlpha = part.life;
      ctx.beginPath();
      ctx.arc(part.x, part.y, part.size, 0, Math.PI * 2);
      ctx.fill();
    }
    ctx.globalAlpha = 1;

    ctx.restore();
  }

  function drawCloud(x, y, scale) {
    ctx.fillStyle = 'rgba(255, 230, 200, 0.85)';
    const s = scale;
    ctx.beginPath();
    ctx.arc(x, y, 18 * s, 0, Math.PI * 2);
    ctx.arc(x + 18 * s, y + 4 * s, 22 * s, 0, Math.PI * 2);
    ctx.arc(x + 38 * s, y, 16 * s, 0, Math.PI * 2);
    ctx.arc(x + 18 * s, y - 6 * s, 14 * s, 0, Math.PI * 2);
    ctx.fill();
  }

  function drawPipe(p) {
    const x = p.x;
    const topY = p.gapY;
    const bottomY = p.gapY + PIPE_GAP;
    const groundY = H - 80;

    // gradient
    const grad = ctx.createLinearGradient(x, 0, x + PIPE_W, 0);
    grad.addColorStop(0, '#2d5a1a');
    grad.addColorStop(0.15, '#4a902b');
    grad.addColorStop(0.5, '#7bc94a');
    grad.addColorStop(0.85, '#4a902b');
    grad.addColorStop(1, '#2d5a1a');

    // Top pipe
    ctx.fillStyle = grad;
    ctx.fillRect(x, 0, PIPE_W, topY - 18);
    // Top cap
    ctx.fillRect(x - 4, topY - 18, PIPE_W + 8, 18);
    // Top cap highlight
    ctx.fillStyle = 'rgba(255,255,255,0.15)';
    ctx.fillRect(x - 4, topY - 18, 14, 18);

    // Bottom pipe
    ctx.fillStyle = grad;
    ctx.fillRect(x, bottomY + 18, PIPE_W, groundY - (bottomY + 18));
    // Bottom cap
    ctx.fillRect(x - 4, bottomY, PIPE_W + 8, 18);
    ctx.fillStyle = 'rgba(255,255,255,0.15)';
    ctx.fillRect(x - 4, bottomY, 14, 18);

    // Outline
    ctx.strokeStyle = '#1c3a0d';
    ctx.lineWidth = 2;
    ctx.strokeRect(x, 0, PIPE_W, topY - 18);
    ctx.strokeRect(x - 4, topY - 18, PIPE_W + 8, 18);
    ctx.strokeRect(x, bottomY + 18, PIPE_W, groundY - (bottomY + 18));
    ctx.strokeRect(x - 4, bottomY, PIPE_W + 8, 18);
  }

  function drawGround() {
    const groundY = H - 80;
    // Sand/dusk ground
    const g = ctx.createLinearGradient(0, groundY, 0, H);
    g.addColorStop(0, '#8b5a2b');
    g.addColorStop(0.4, '#5e3a1c');
    g.addColorStop(1, '#2d1a0c');
    ctx.fillStyle = g;
    ctx.fillRect(0, groundY, W, 80);

    // surface line
    ctx.strokeStyle = '#1c3a0d';
    ctx.lineWidth = 3;
    ctx.beginPath();
    ctx.moveTo(0, groundY);
    ctx.lineTo(W, groundY);
    ctx.stroke();

    // Pattern stripes (moving)
    ctx.fillStyle = 'rgba(0,0,0,0.15)';
    for (let i = -2; i < W / 40 + 2; i++) {
      const stripeX = (i * 80 + groundX + 120) % (W + 80) - 40;
      ctx.beginPath();
      ctx.moveTo(stripeX, groundY);
      ctx.lineTo(stripeX + 30, groundY + 80);
      ctx.lineTo(stripeX + 50, groundY + 80);
      ctx.lineTo(stripeX + 20, groundY);
      ctx.closePath();
      ctx.fill();
    }

    // Pebbles on top
    ctx.fillStyle = '#3d2412';
    for (let i = 0; i < 12; i++) {
      const px = (i * 60 + groundX + 60) % (W + 40);
      ctx.beginPath();
      ctx.arc(px, groundY + 4, 3, 0, Math.PI * 2);
      ctx.fill();
    }
  }

  function drawBird() {
    const b = bird;
    ctx.save();
    ctx.translate(b.x, b.y);
    ctx.rotate(b.rotation);

    // Shadow
    ctx.fillStyle = 'rgba(0,0,0,0.2)';
    ctx.beginPath();
    ctx.ellipse(2, 2, b.radius, b.radius * 0.85, 0, 0, Math.PI * 2);
    ctx.fill();

    // Body
    const bodyGrad = ctx.createRadialGradient(-4, -4, 2, 0, 0, b.radius + 4);
    bodyGrad.addColorStop(0, '#ff9ff3');
    bodyGrad.addColorStop(0.5, '#ff6b6b');
    bodyGrad.addColorStop(1, '#c0334a');
    ctx.fillStyle = bodyGrad;
    ctx.beginPath();
    ctx.ellipse(0, 0, b.radius, b.radius * 0.92, 0, 0, Math.PI * 2);
    ctx.fill();

    // Wing (flapping)
    const wingY = Math.sin(b.wingPhase) * 8;
    ctx.fillStyle = '#ffd93b';
    ctx.beginPath();
    ctx.ellipse(-4, 4 + wingY, 9, 5, -0.4 + wingY * 0.05, 0, Math.PI * 2);
    ctx.fill();
    ctx.strokeStyle = '#b87c0a';
    ctx.lineWidth = 1.5;
    ctx.stroke();

    // Eye
    ctx.fillStyle = '#fff';
    ctx.beginPath();
    ctx.arc(8, -4, 5, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#1a1746';
    ctx.beginPath();
    ctx.arc(9.5, -4, 2.5, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#fff';
    ctx.beginPath();
    ctx.arc(10, -5, 1, 0, Math.PI * 2);
    ctx.fill();

    // Beak
    ctx.fillStyle = '#ffaa33';
    ctx.beginPath();
    ctx.moveTo(13, -1);
    ctx.lineTo(20, 1);
    ctx.lineTo(13, 3);
    ctx.closePath();
    ctx.fill();
    ctx.strokeStyle = '#b87c0a';
    ctx.lineWidth = 1;
    ctx.stroke();

    // Tail
    ctx.fillStyle = '#ffd93b';
    ctx.beginPath();
    ctx.moveTo(-12, -2);
    ctx.lineTo(-18, -5);
    ctx.lineTo(-16, 0);
    ctx.lineTo(-18, 5);
    ctx.lineTo(-12, 3);
    ctx.closePath();
    ctx.fill();
    ctx.stroke();

    ctx.restore();
  }

  // ============ Loop ============
  function loop() {
    update();
    render();
    requestAnimationFrame(loop);
  }

  reset();
  loop();
})();
</script>
</body>
</html>

Here’s what I built:

Theme: “Sunset Flier” — instead of the classic green/teal Flappy Bird look, I went with a dusk-sunset palette (deep purple → coral → gold) with silhouetted mountains, a glowing sun, drifting clouds, and twinkling stars in the upper sky.

Bird: A coral-pink bird with a yellow flapping wing, animated beak, tail, and tracking eye. Wing flaps physically animate when the bird rises/falls.

Mechanics:

• Classic gravity + flap-impulse physics, tuned to feel responsive
• Pipes with random gap placement, smooth scrolling, cap-with-highlight rendering for a chunky 2D look
• Score increments when the bird passes a pipe, with a particle pop and chime SFX
• Collision with pipes, ceiling, and ground triggers game over with screen flash, screen shake, and death particles

Polish:

• Press Start 2P pixel-font HUD with score and “NEW BEST!” pulse on record-breaking runs
• Game-over panel with medal system (★ / ✦ / ✧ / •) based on score thresholds
• High score persisted via localStorage
• Animated start screen with bobbing panel
• Procedural sound effects via Web Audio API (flap, score, hit, death) — no external assets
• Moving ground stripes/pebbles to reinforce the sense of speed
• Responsive: scales to viewport, supports mouse, touch, and keyboard (Space/↑/Enter)
• Retry button + tap-anywhere-to-restart convenience

Just open the file in a browser — tap/click/press space to fly.

f32, f16, bf16, q8_0, q4_0, q4_1, iq4_nl, q5_0, q5_1

./llama.cpp/llama-cli
–model unsloth/GLM-5.2-GGUF/UD-IQ2_M/GLM-5.2-UD-IQ2_M-00001-of-00006.gguf
–temp 1.0
–top-p 0.95
–min-p 0.01
–cache-type-k q4_1
–cache-type-v q4_1

> **Z.ai (@Zai_org):**
> Introducing GLM-5.2: Frontier Intelligence, Open Weights
> 
> - Significant improvements in coding and agentic tasks
> - Strong long-horizon capabilities with a 1M context window
> - Two levels of reasoning effort: GLM-5.2 (max) pushes the limits, while GLM-5.2 (high) strikes a strong