The objective is to score as many points as possible by making balls of one color form various shapes.
Use the mouse to move the balls. First select the ball to be moved, then an empty destination square. If the destination square is occupied by another ball, that ball is now selected to be moved.
Note that you cannot always place the ball where you'd want to.
After you move a ball, three more appear, except when you formed a shape.
The more balls in a shape, the more points you score for making it.
You can select three different game modes. They are very similar, except the shapes you need to create are different for every type. See below.