Your objective in this game is to build turrets to stop waves of enemies from assaulting your space station's power core. Using energy to build and enhance your defenses is key to survival, but don't use it all up as energy is what protects your power core if any enemies get through! You will lose when you have no energy left. This game can potentially last forever as there are infinite waves, however you will eventually be defeated as each wave increases in difficulty. Use YOUR MOUSE to control the game. Have fun!