There is a big white ball in the middle of the playing area. You control a smaller ball on a piece of a string with which you are trying to prevent the black ones from pushing the big white one out of the circle marked on the playing area. The harder the black ball is hit the more points you get. For those points you can buy some enhancements (speed, size of your ball, size of the white ball, bigger space around the white ball). Every ten rounds you will meet the boss. As soon as the big white ball gets outside the marked area you loose.