is a 2D arcade game in which the player runs, jumps, and fires missiles on the surface of a planet in an attempt to clear the alien infestations. It makes use of the touch screen and accelerometer allowing players to flick to fire missiles, tap to jump, and tilt to run around the surface. The game camera ensures that the player is always at the top of the screen and the planet seems to rotate underneath. After a missile is fired, the player is able to run back and forth to guide the missile to its target. There are two versions of the game. Next to the International Edition there is a US edition that supports the rewards network Kiip.