Left and Right Arrows: Rotate
Up Arrow: Thrust
Down Arrow or SHIFT: Shield (will recharge...)
SPACE: Fire main weapon
Z: Fire bomb weapon (area effect damage, uses shield energy)
NOTE: collect the glowing power-ups to enhance your ship!
L: Skip level (later levels more difficult but score higher)
R: Switch between Modern and Retro graphics
A: Add asteroid - go crazy!
E: Add enemy ship - they will hurt you!
Escape: Pause the game