Rolling in the Clouds

Rolling in the Clouds is the only mission of the Rolling Green Galaxy in Super Mario Galaxy. The mission's objective is to roll the Star Ball to the end of the course.

Layout
The player starts on a small platform with the Star Ball and a hole that will launch Mario up to a higher platform with coins, Goombas, and Micro Goombas. At the end of that platform is a hole that will lead to a set of rails, causing the Star Ball to roll down them and to the next planet. The planet has many holes, coins, and Goombas and touching the ? Coins will cause trails of Star Bits to appear. Across a stone bridge is a split path: the right has many flower hills that will affect the way the ball rolls, and the left has a narrow path with a ? Coin that will cause Star Bits to appear. The hole at the end of the split platform will launch Mario to the goal, and placing the Star Ball in the final hole will cause it to explode, allowing the player to collect the Power Star within.