Download this app if: you want to defend your planet against waves of UFOs.
Defend against wave after wave of ceaseless UFOs intent on destroying the moon! As they get steadily stronger, you must constantly upgrade your guns to keep pace.
Timing is everything - shoot them just before they land to earn maximum rewards. Shoot long sequences of the same colour UFOs to build...
Shooter — Fire lightning guns from the lunar surface to blast the saucers back to outer space before they touch down.