8x8 game of life
I got an 8x8 display for my Arduino without any plan. After displaying some simple shapes, I remembered my Java-based game of life project from 2006, and had a go at making it run on the 8x8 display.
Due to the limited size the games end very quickly. It will detect when the game has ended (everything dying or no further growth) and will reset after a while, so it will keep itself active.