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

POKE 32818,165 
Unlimited keys:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 8361,181 
Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 49693,165 
Set number of lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program. Note: X represents the desired number of lives. 

POKE 32354,X 
Level passwords: 

CAIVE
VAULT
HAWLO
LIAYR
CRYPT
LYONS
DUNGN