Cheat mode:
Type WIZ or WIZBOREWIZ at the second title screen, with the number of players option to enable cheat mode with invincibility. Press a number to start at the level last completed.
Level skip:
Press 1 after losing with level 1 completed to restart the game with level 1 completed. Press 1 + 2 after losing with levels 1 and 2 completed to restart with both levels completed.
Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 27440,189
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 27434,169
Invincibility:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 32508,96