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Drop an asteroid of your chosen size on any address and read back the fireball, wind speed and earthquake radius it makes.
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Asteroid Launcher sits in Sandboxes & Simulators under Play, and we have it filed as instant — good within five seconds of loading. It reads as unsettling and clever.
Physics toys, ecosystems and falling-sand games with no win condition. Set the initial state, then find out what the rules do with it.
Design a creature from joints and muscles, then watch a genetic algorithm spend hundreds of generations teaching it to limp.
Build a machine from wheels and rods to push a ball into a zone, and accept that it will topple over the first nine times.
Conway's cellular automaton with a library of known patterns, still the clearest demonstration that rules alone make worlds.
A free flight simulator in the browser using satellite terrain for the entire planet, with real air traffic overhead.
Combine two things to make a third, forever, until you have coaxed a language model into inventing something absurd.
Start with four elements and work towards seven hundred, most of which are jokes you only understand on arrival.
A cabinet of small physics experiments — cloth, water, ragdolls, particles — built by one developer who simply kept going.
A sealed glass sphere of water, sand and brine shrimp that you seed and then leave running, ecosystem permitting.