Sensitive

Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7970,173

Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7997,173

Easy mode:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7467,173