Awesome


Wait until cargo/energy screen appears, move the cursor to the
top left-hand corner with the joystick, then press fire and
'+' on the keypad simultaneously. The screen should flash and
you will be furnished with infinite shields and lives.
To get to the end of the game, simply go to the outer-most planet.

F1 - disables enemies
F6 - replenishes energy
0-9 - different weapons