Description Do you have what it takes to fend off the alien invasion? Destroy all aliens with 6 epic weapons in 9 awesome stages! Winning a level will award you with stars, spend your stars in the Tech Tree to upgrade your weapons. Playing levels will also award you with coins. Use coins to buy Power-Ups for an extra advantage on the battlefield! Enjoy! Controls 1. Click to shoot. 2. Spacebar to aim down your gun sight. 3. Power-Ups: Buy Power-Ups before you start a round, and then click the Power-Up icon in the top left of your screen. Select a target for your Power-Up if prompted.