destroy barracks, trucks,

      saucer launchers, & saucers

  avoid missiles & bullets, they hurt



             joystick only



Space* * * * * * * * * * * * * * * pause

Ctrl-S * * * * * * * * * * * * * * sound

Ctrl-R * * * * * * * * * * * * * restart

Ctrl-E Y * * * * * * * * * *erase scores

         (space bar skips intro)