Successfully complete the indicated task to unlock the corresponding cheat 
option:

Infinite health: Collect all 60 skulls. 
One hit kills: Collect all 60 turtles. 
Ship does not take damage: Collect all 60 seeds. 
The Wild Things will not eat you: Collect all 60 bee hives. 
Treasures appear when holding Select: Collect all 60 geodes.