You're in command at Missile Control. Your job, protect your Cities at all costs. Waves of merciless Alien Spaceships are attacking. Blast their incoming bombs out of the sky . . . not enough . . . . Now get rid of these relentless marauding Invaders . . . . Blast their spaceships too. Not easy once they throw up their protective Force Fields. Finally, there is only one way . . . . use your Defense Shields and try a bank shot off their moving platforms.
The action gets faster and faster. You test every shooting skill you know, plus invent a few new ones, but protect your Cities you will . . . .