Complete the first action segment, then move the pointer to the "Shield" box in the to left corner of "The Armoury" screen. Hold [Keypad Plus] and press Fire. The screen will flash to confirm correct code entry. Refill energy to all the weapons. Shields can still be depleted when hit, but the ship will be indestructible when they reach 000. Additionally, press one of the following keys during game play to activate the corresponding cheat function.

Code - Effect

Press the 1 key - Remove weapon
Press the F6 key - Restore energy
0, [minus], [equals], or [plus] - Select more weapons
Press buttons 2-9 - Select various weapons
Press the F1 key - Skip action sequences