You must stop the martian invasion, but you must do it with only one tap!
The martian Head Honcho has launched an all-out attack on the Earth! Can you, a humble space cadet, make it through the martian armies of ships, aliens, and giant floating heads and destroy the Martian Head Honcho before he destroys the Earth?
Oh, and you also have to do it with only one tap! Good luck space cadet!