On level 1-2 jump up on top of the ceiling blocks when you get the chance. Keep running and go past the pipe that leads you to the finish. Keep on going until you come to a Warp Zone that can take you to World 2-1, World 3-1 or World 4-1. Choose one, it's your choice.
On level 4-2 keep jumping until you find a some invisble blocks. Hit the blocks above it until you find a beanstalk/vine or whatever you want to call it. Climb up and go past the little 4-3 style course. You'll come to a Warp Zone that leads you to World 5-1, World 6-1 or World 7-1. It's again your choice.
Added by: nintendo_dude Jun 7th 2005, ID#3569