kick the ball when it falls in front of his right foot. the ball should be kicked when it is just far enough off the ground that it moves toward the roof of the net (roughly knee height - see picture). after each shot return to the middle of the screen to be prepared for the next ball.
hit the ball on the volley. if you let it bounce, points are halved and it is no easier to score.
always press "submit" at the end of each game, within the time allowed, or your score will not count. also make sure the security code is correct, or again your score will not 