It already has "RACE!", where you try to get to the finish by pressing your button as fast as possible. "SIMON!" is next. Each player gets a color. In "SIMON!" the grey square will change into one of the four colors at a random time. If the color is yours, press your button! If you miss it, you're out of the game! If you press it and it's NOT your color, you're out! Last one left wins!