The object of the game is to get to the end of each level while destroying as many aliens and collecting as much treasure as possible. There are three types of aliens - one that sits still, one that chaises you and one that shoots at you. If you touch any of them, or get shot, the level will end. There are three types of ammo for you to use and spikes for you to avoid. The first is a normal bullet that can ricochet around the room, the second is a grenade that explodes on impact and the third is a multi-bullet that splits into two normal bullets when hitting a solid obstacle. You must complete each level before you are allowed to try the next level. Touch the screen to set the crosshair, and either press fire to fire the next bullet, indicated on the sliding ammo rack, at the crosshair or press the move button to move toward the crosshair. When pressing and holding down the move button you will see a force rod extend above the move button. Releasing the move button when the force rod is higher will move you at a greater speed. You can replay levels multiple times if you like. Any unused ammo will increase your score for that particular level. You can also post your high scores for each level on FaceBook for your friends to see. Also, do not forget to collect the coins on your way through to increase your score. The beginning game has a total of 18 levels but more levels, weapons, aliens, etc… will be added in future versions of the game.