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

POKE 5908,76
POKE 5909,88
POKE 5910,23
POKE 5911,234 
Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 35070,173