Get max life:
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The big heart located before the Big Rock tunnel will reappear everytime you
have to continue so if you keep dieing and continuing you can keep getting one
more heart until you have max health. You can also continue getting the heart
after you have max health if you die in the tunnel. Kudos to my girlfriend Anita
for figuring this one out!
Password:
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When you get to the end of Level 4 where the robot asks for a password, put in
747.
