Hotkeys: S - send next wave P - pause M - mute/unmute ESC - discard/unselect current item F - toggle fast-forward mode 1,2,3,4,5 - upgrade propery when item selected R,T - downgrade range and spread (catapults only)
Goal of the game
Robot armies are attacking your space heaquarters. Stop them whatever it costs. Protect the hq gate by gate installing turrets, catapults and barricades in their way. Use your resources cleverly, or you'll run out of your budget fast.