Spinning-Star Sky is the first level of Frosted Glacier. It is unlocked via completion of Morton's Compactor Castle, and its own completion unlocks Cooligan Fields and a spot with a Bubble Baby Yoshi.
This level is snow-themed, and begins near a series of Star Lifts. A ? Block containing a power-up is located above the Star Lift. A Koopa Troopa is encountered, along with another Star Lift above two Goombas. Two more Goombas are found, and are followed by more Star Lifts above a pit, as well as a Paratroopa. A Koopa Troopas and some Goombas are found on a section of land. Coins can be found hidden in sections of the ground. Another Star Lift is found, followed by a Piranha Plant on a row of Brick Blocks. More Goombas and a Koopa Troopa follow, along with a row of Star Lifts that leads to the Checkpoint Flag. Some Star Lifts can be found above a row of Munchers, and there is a ? Block containing a power-up. A Paratroopa is found with a Green Ring. Another row of Munchers is found, with Star Lifts and Jump Blocks above them. Some Star Lifts are found over a pit, with coins and a ? Block above them. More Munchers are found with Star Lifts above them, and a Brick Block containing a Starman is found in a wall below. More Star Lifts are found, along with a Goal Pole.
- Star Coin 1: The first Star Coin is in mid-air, after a series of Star Lifts.
- Star Coin 2: After an area of Star Lifts, the second Star Coin is found on top of the highest ledge.
- Star Coin 3: Near the very end of the course, the Star Coin is hidden in the ground.