In level 3, at the far-Right end of the museum's first level is a 1-Up; grab
it and jump onto the rising platforms. When you reach the third platform
or until the screen Starts to scroll Up, jump back Down and the 1-Up
should be there again.
Play the fifth level until you get to the second platform at the top. Now
walk off the Left side and fall in a straight line. You'll pick Up three 1-Ups
and lose one life.
