Move the paddle with your mouse, and try to get the basketball to touch the paddle. There are nine 9 levels/backdrops. in the first round, try to get the score on ten. Keep getting 10 and when your score is on 90, that means you won! But if the ball gets on the line, then you lose.
This might glich a little bit when it gets stuck on the line so, click the green flag a few times.