Enter one of the following codes at the title screen to start at the corresponding level with unlimited lives.

Level 2:
Hold Up/Right + A on controller two and press Start on controller 1.

Level 3:
Hold Right + A on controller two and press Start on controller 1.

Level 4:
Hold Down/Right + A on controller two and press Start on controller 1.

Level 5:
Hold Down + A on controller two and press Start on controller 1.

Level 6:
Hold Down/Left + A on controller two and press Start on controller 1.

Level 7:
Hold Left + A on controller two and press Start on controller 1.

Begin a game in two player mode and intentionally allow player two to die. Do not press A on controller two to resume game play. Instead, continue the game using controller one. Switch to controller two when the last life on player one's game is lost to continue.