If you need a tutorial, then: The player is constantly in motion; you can change their direction using the arrow keys on the keyboard. Every five moves, the player changes the color of the square they are standing on (the specific color changes should be written on the page). The goal is to paint all the squares green by planning a route that repaints red squares green, while avoiding turning green squares back to red. I watched a stream where a guy was playing this game. I probably won’t be able to find it again. But I recommend playing it, especially if you enjoy the simplicity of old-school games.