Description: Aliens are launching a massive attack on your home world! As the last line of defense do you have what it takes to defend your planet?rnrnControls:rnMovement- Arrows or A,D keysrnAim- MousernFire Cannon- Left ClickrnFire Missile- SpacernPause- P keyrnQuality- Q keyrnUpgrade Tank/Turret- Q or E Keys. Clicking icons at bottom rightrnUse Specials: Number Keys or clicking buttons