Cheat mode:
Continuously sweep the D-pad in a clockwise Full-Circle starting at
the Up position until the screen flashes. Repeatedly tap Up until the
flashing stops. The screen should have flashed a total of four times
corresponding to four cheat functions. The first flash enabled level
skip. Press Pause while playing the game and press B to jump to the next
level. The second flash enabled unlimited energy. The third flash
enabled unlimited ammunition. The fourth flash enabled unlimited
money.