Game of life but reeeaaaaallllllllly big, like probably billions of pixels in size thanks to sparse encoding.
You can hold the Space Bar to start/pause the simulation, use the Middle Mouse Button to move around, the Mouse Scroll to zoom and un-zoom, the Left Mouse Button to place a pixel and Right Mouse Button to place 10k in a 100 x 100 area (makes very cool structures btw). Uses OneLoneCoder’s Pixel Game Engine.