- Green Star 1: In the underground section, go in the Mystery Box on the ledge near the start of the section by backflipping or jumping on the piranha creeper. In the box, bounce on the piranha creepers to the star within ten seconds.
- Green Star 2: Fall to the bottom of the water right after the checkpoint to get the star.
- Green Star 3: In the third section, go into the Green Star Ring and collect all of the green coins to get the star.
At the second body of water, jump on the piranha creeper to go over it to a hidden alcove. In the hidden alcove, run to the right side to get the Warp Pipe Stamp.
World 5 Pipe
At the Roulette Block near the end of the level, go on it and climb the wall in Cat form. Afterwards, jump on the platforms moved by the water current to the orange pipe to make a shortcut to the next world.