Simple computational fluid dynamics solver in #quadplay, the retro fantasy console. I'll release as a source sample in the next update. This was quite an optimization puzzle to get running at 60 Hz.

I make little doodles like this as examples and then tend bootstrap game jam projects with them. This one is going in the other direction. It is based on code from a game jam 10 years ago, where it ran in a pixel shader at massive resolution.