An alien has been blasted off his home planet and crash landed on a strange planet called earth. The only thing the alien has is a particle gun. You must guide him to his ship by going through 40 levels. You start off with one gun mode evaporate. To get back you need to upgrade your gun and find different gun modes to pass the levels. Using the gun try to get to the each levels portal by evaporating and rebuilding blocks of the level.