Cheat mode: Hold Up, hold A, then release Up
then A at the title screen. Then, hold Right, hold
A, then release Right then A. Hold Down,
hold A, then Down then A. Hold Left,
hold A, then release Left then A. Hold Left
and press B. A sound will confirm correct code entry.
Press Up or Down to select a new starting level.
Pause game play and press Select to change weapons.
