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