CTRL or SHIFT TO FIRE, [SPACE] USE SMARTBOMB, ARROWS = MOVE
It's 1982, and you're playing an arcade game. Of course it has a space theme -- it's 1982. Your mission: Destroy everything you can.
Arrow keys drive the ship. SHIFT or CTRL can be used to fire (for the fastest firing rate, hold the key down.) Use the SPACE BAR to fire "smartbombs", which will kill any bad guys that happen to be chasing you.
The goal: Destroy the bases by shooting out the turrets attached to them. When all turrets are dead on a base, it will explode. When all bases are dead, you will pass the level.
Avoid crashing into "spaceballs" (green asteroid slimeball-like things), and shoot or steer clear of "bad guys" that will occasionally appear and chase you. As you destroy each, the speed of the game will increase slightly.
*** LEVEL PASSED ***
This is the part where the game would say "level 2" and you would then get to replay the same scene, but with everything sped up -- since it was 1982, this was a way to make games increasingly difficult at the time.
Your mission, should you accept it: Repeat the level you just passed, but with everything moving around you 25% faster.
Thanks for playing!
"Game over man, game over!"