Invincibility: Press Up, Down(2), Left, Right,
Left, Up(2) at the title screen.
Level select: Press Left, Right, Up(2), Down,
Up, Right, Left at the title screen.
Rapid-fire gun: Begin game play on level 4 to get to the diagonal platform.
Repeatedly press A to keep going on the platform and find
a rapid-fire gun.
Information in this section was contributed by Camhuffman.
Avoid damage from falls: Pause game play just before hitting the ground. When
game play is resumed, you will land without damage.
