Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 15171,173
Unlimited missiles:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7134,173
Unlimited time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 42769,173