Your mission in this epic defense game is to take a role of Commander of the space battle station and destroy all incoming vehicles and do not allow your enemy to seize those missile silos. Use YOUR MOUSE to aim and click LEFT MOUSE BUTTON to shoot (hold down to continuous fire). Drag YOUR MOUSE to to fire “Vulcan” or “Barman” and use 1-8 NUMBER KEYS to switch weapons. Press SPACEBAR to open menu with upgrades. Good luck!