Cheat mode:
Type STEGTHESLUG at the title screen to enable cheat mode with unlimited lives. The screen border will change color to confirm correct code entry. Begin game play and press one of the following keys to activate the corresponding cheat function.



Effect Key 
Skip 10 levels [F3] 
Skip 1 level [F7] 
Stage skip [F5] 



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Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 
POKE 16705,173 
Level 1 penguins:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 27123,181 
Fast game:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 4822,165