Player 1 (Left Paddle) Use 'w' and 's' keys to move the paddle up and down. Player 2 (Right Paddle) Use up and down arrow keys to move paddle up and down. First player to score 10 points wins. Points are awarded when the ball bounces off the wall behind the opposing players paddle. Only the first wall bounce is counted if the ball becomes trapped behind the paddle and bounces repeatedly against the wall until free.