Press the Green flag. Press play. This is a 2-player game. One person is Green, the other is Blue. Use the instructions below to see which keys to press. Left Arrow - Blue throws ball Up Arrow - Blue moves up Down Arrow - Blue moves down s - Green throws ball a - Green moves up z - Green moves down Every time Green or Blue gets hit by a ball, the other person's score goes up. Whoever reaches a score of 500 wins!