FOAM mock-up · WHORL
Jelly, oobleck, glue, honey and ketchup in a sink of water, all one simulation, and a first go at FOAM's game on top of it. Drag to steer the googly-eyed soap bubble: scrub the grime, catch the loose bubbles into your raft, and at 40 the drain opens. Jelly hops after you and gulps your foam; glue and honey float, and glue holds a bubble till it pops.
Every material on its own, and the bubble trying each one: slowly through, then a ram.
The game and the 3D sandbox are the whole simulation in three dimensions on the graphics chip. Flat is the same materials seen from above, in pixel art, and Flat on the CPU runs that without the graphics chip, to compare; past about 6,000 particles it slows down. The top right of the game shows the frame rate; ×0.5 beside it means the simulation is running at half speed to keep up. 3D and Flat need WebGPU: Chrome, or Safari on iOS 26 and later. Tap the title in the game to come back here.