After starting this game, the ball will bounce around to either your side or the other players. You have to move your mouse in the direction that you want YOUR players represented side to move. In this game you are supposed to hit the ball when it comes to your side and make sure it does not hit the wall. If it does then the other player scores a point.There are levels to this as you go on and the higher the level, the higher goes the speed and the difficulty level of the computer playing.
I have changed the types of activities that my ball, and 2 bats do also by changing a bit of the background stage.