Enter this code to access all of the Levels, and get the Secret Map. Enter this at the password screen: LEFT, LEFT, LEFT, LEFT, DOWN, RIGHT, RIGHT, LEFT, LEFT, DOWN, RIGHT, DOWN, LEFT, UP, RIGHT.

In the first room of the first level there are two platforms floating in the air. Go to the one with the bee flying round it and stomp on it three times. There are a lot of platforms like this throughout the game.