Repel the invaders

            joystick to fly

  button 0 to fire, 1 for afterburners



H* * * * * * * *arm heat seeking missile

G* * * * * * * * * * *arm guided missile

A* * * * * * * * * * * * * * *auto pilot

C* * * * * * * * * * * * * * * *computer

Esc* * * * * * * * * * * * * * * * *help

Ctrl-P * * * * * * * * * * * * * * pause

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

Ctrl-R * * * * * * * * * * * * * restart
[eof]