Unlimited lives:

Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 53264,128 

Unlimited lives (alternate):

Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 3574,33 

Invincibility:

Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 3516,234 

Invincibility (alternate):

Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 3562,234 

Cheat mode:

Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 3561,234

POKE 3562,234

POKE 53264,126

POKE 3574,44