This game has 32 levels. The goal is to destroy all the balls on each level by firing at them from cannon shells. At the beginning of the level the player is given a set of shells of various stripes. The player decides with every single shot how to shoot the projectile. Initially shells are always less powerful than the targets, so the player has one shot to hit as many of them at the same time while trying not to fall within the path of the projectile which will deduct one life. (This is why you cannot get illuminated with blue light and are changed according to the selected shell.) When the projectile is finished level is lost. With several successful hit per shot you�ll earn different bonuses like special shells, extra lives and rubies. Rubies are also given at the end of each level, and you may use the "Market" menu to purchase special shells and lives.