Invincibility:
Begin game play and qualify for a high score entry. Enter ARM as initials on the high score screen. Play again and qualify for another high score that is lower than the previous attempt. Enter OUR as initials on the high score screen. Press the Reset button on the Genesis when demonstration mode begins. Begin a new game with invincibility enabled.

Unlimited lives:
Begin game play and qualify for a high score entry. Enter OLD as initials on the high score screen. Play again and qualify for another high score that is lower than the previous attempt. Enter AGE as initials on the high score screen. Press the Reset button on the Genesis when demonstration mode begins. Begin a new game with unlimited lives enabled.