It's a great logical game, where you have power-plant with an electromagnetic field and a canon you launch a shell from, the shell hits spheres and ricochets from them. In order to get to next level you need to hit all of the spheres by one shell using ricochets, there are several attempts allowed. You settle the position of the canon the shell flies from and the angle of it's flight. There are also magnetic and repulsive particles, which cause traction you have to consider. That makes the task more difficult and more interesting certainly.