The object of the game is to change the color of the squares until the entire screen is a single solid color. Starting with the square in the upper left corner you can change the color of the blocks in order to match that of the surrounding squares. This is done repeatedly until the entire screen is a single color. The game is controlled by the large colored blocks on the side of the screen. The object of the game is to clear the screen in as few moves as possible. Under the default settings you must do so in under 22 moves in order to win.