Level skip:
Press [Ctrl] + [Shift] + [Run/Stop] + [Commodore] to advance to the next level. Alternatively, press [Run/Stop] + [Shift] + A + S.
Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7629,238
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7683,238
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 7983,238