Prepare for the unyielding onslaught. Equip powerful weapons and unleash massive nuclear strikes to stop the enemy advance.
Shoot oncoming enemies with a variety of weapons that can be purchased in the interlevel menu. But, upgrading your defenses sends your Pts. So the less you spend the higher your final score will be.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.