Awesome Codes -

Cheat mode:
Use the joystick to move the cursor to the top left corner of the cargo/energy screen. Press [Keypad Plus] + Fire to enable cheat mode The screen will flash to confirm correct code entry. Unlimited shields and lives will be available while cheat mode is active. Press one of the following keys to activate the corresponding cheat function.

Effect	Key
Disable enemies	[F1]
Full energy	[F6]
Various weapons	0 - 9

Jump to end of game:
Enable cheat mode, then select the outermost planet.