- Green Star 1: When you reach an area filled with piranha plants, you will see the star on a platform. Jump to get the star and get back on the Grumblump when it passes.
- Green Star 2: When you find a star-shaped coin ring, touch it to generate eight coins. You have a few seconds to collect every coin and reveal the star.
- Green Star 3: On the last Grumblump, wait until you see the star in the air. When the Grumblump is upwards, jump and get the star.
After the checkpoint, there is a long pillar with a fire bro and the stamp. Jump off to get the stamp and wait for the next Grumblump to pass.