KEYBOARD COMMANDS:
 Use arrow keys to move
 CTRL to shoot
 Use "1", "2" and "3" to toggle between weapons


Next level:
If you want to go the next level press the key "O".

Map:
To get the map press the key "M".

Cheat mode:
Press one of the following keys during game play to activate the corresponding 
cheat function.

Effect                                Key 
Advance to next planet        O 
Invincibility                         I