Cheat Codes:

There is a secret password zone in the "About"
dialog box Hold the shift key and click on the black pixel of the right eye on the image of Bug (in the "About" box). A dialog box will appear.

Click in the box, type BABYSEALS, and click either the WOW! or YIKES! boxes (not the OK box)

Now there is a new menu to the right of the Help menu. It does not show anything, but when the blank area just to the right of the Help menu is clicked, a new menu drops down with the following on/off choices:

Level Duck/Crouch plus Up = skip forward one level
Duck/Crouch plus Down = skip backward one level
Flying Bug Press Y to lift off and direction controls to move (Note: If this is checked, the Level Skip cheat also works) Invincibility
Enemies go right through Bug without hurting him
Hitpoints Bug react as though he's been hurt, but
no hitpoints taken off