Gridworld - a simulation game made up of a grid, as the name suggests. You can control the size of the grid, and what spawns in it. The core of the game are these tiny creatures that each take up 1 square. They have varying nodes on them that represent traits and abilities. Under the hood the game says these have to be “wired” correctly by the neural network to make a creature act right. So basically you let this thing run for hours and eventually get little square creatures that eat plants and maybe each other to live.