In 1-2 you can run across the top and pass the pipe to go to 1-3 and you will have a choice of going to 2-1, 3-1, or 4-1.
In 4-2 you can run across the top and pass the pipe to go to 4-3 and you will have to go to 5-1.
In 4-2 you can hit some invisible blocks, jump on them hit the brick with the vine and climb it up there you will find surfaces that have coins on them. Run across them and you will come across 3 pipes. You will have a choice of going to 6-1, 7-1, or the last world 8-1.
Added by: Joshweiser Jun 29th 2008, ID#12170