Spinning Platforms-This galaxy has different sized platforms that spin at a different speed. There is a small resting platform, where Yoshi can be found on the second mission. There is a Cloud Flower at the beginning too. After the resting section are some spinning gears and even mor platforms before the Power Star.
Spinning and Spinning and Spinning-The goal is the same as in Super Mario Sunshine. All you must do is get to the Power Star, without falling off. There is a Cloud Flower, but that is optional, as for the course can be completed without it, By succeeding rewards you with a Power Star.
Turning Turning Double Time-This mission is the same as the first mission. However, it replaces the Ground Theme music with Underground level music in Super Mario Bros. The turning of the platforms act accordingly, and there is a new portion at the end. Yoshi is available in the mission to make it easier for the player. Upon completing this mission earns you another Power Star.
Green Star 1-
The player must grab the Cloud Flower on the third spinning block. You must then use the clouds to get to the Green Power Star, which is directly to the right of the fourth spinning block.
Green Star 2-
Collecting this Green Power Star also requires the use of the Cloud Flower. Try to keep at least two clouds, then long jump off a block where the far end is on the right, near the end. Spin to make a cloud, and then long jump again. Repeat until you get the star.