If you clear the way for the Sand Balls to fall into the container by eliminating the obstruction, they will fall into the container. The degree of difficulty grows as the number of levels increases, but you will have a good time. Be careful that several traps will force you to replay the level with greater caution than before. Completing each level will earn you points, which you may use to purchase further levels. You will purchase new Ball Shapes using the Points you have accumulated.