Level select
Hold [Down] + [Select] and press [A],
[B], [A], [B], [A], [B], [A], [B]
on the player selection screen to jump to one of the four stages
in the game. Repeat the code to jump to the end Boss.
Hints
Secret bomb
Shoot in the high part of the building on the left
side of the screen in the first level to receive a bomb.