we spent $10k building an ai agent that designs rollercoaster tycoon-style theme parks inside @magicpatterns as an experiment.

one of our founding engineers is obsessed with RCT. to build this, @alexlee_ went back to first principles: guest behavior, rollercoaster spline logic, and the mechanics behind rides like scrambled eggs, swinging ship, log flumes, and steel rollercoasters.

then he built full themed worlds. a lava world, a chocolate factory, a pirate’s cove, a neon disco - each with its own rides, shops, and scenery.

now, models converge by default on the same generic output. in web, that’s vibe-coded slop. turns out the same problem exists in theme parks. just handing the model the right pieces isn’t enough.

so we built an eval loop.

1. magic patterns generates a park
2. a second agent grades it: does every coaster have a valid track with a drop, is every ride reachable by a path, whether each world’s scenery matches its theme, and the like
3. feeds that back, updates its own rules, and tries again

you can now prompt “build me a cool theme park” and get back a fully working one with guests walking around, real rides, connected paths, themed worlds, and coasters with actual spline logic.

you can even follow individual guests and watch their thoughts as they ride.

play around with it over the weekend: http://magicpatterns.com/theme-park

AI Theme Park Generator — Build Your Own Theme Park | Magic Patterns

Source: https://www.magicpatterns.com/theme-park

Imagine your perfect theme park

Build your park

Design System3D Rollercoaster Tycoon

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