This is a game : PONG, and your computer is your adverse, exeptly on the two player mode. For the noob, easy, norml, hard, and cheated mode, use the arrow keys for move the blue racket, and presse space bar for smatch if the purple bar is completed. On the two player mode, use the Z key and the S key for move the blue racket, and the arrow keys for move the red racket. Have fun !