Cheat mode:
Enter CHEAT as a name at the high score screen.
Cheat mode (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 3929,165
Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 6964,173
Unlimited time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 6492,173