Awesome

CheatMode:
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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.
Result         Key
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Disable enemies - [F1] 
Full energy   - [F6]
Various weapons - 0 - 9
Jump to end of game:
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Enable cheat mode, then select the outermost planet.