Hurry-Scurry Galaxy

Hurry-Scurry Galaxy is a galaxy in Super Mario Galaxy. Whenever the Player steps on a tile, it'll disappear within a few seconds. There is a planetoid with the shrinking tiles and a black hole in the center. Therefore, Mario or Luigi can't afford to stay in one place too long. There are also Music Notes that the Player must collect to get a Power Star.

Shrinking Satellite
Mario starts out on a small walkway that turns different ways. The beginning is a solid platform which Mario must not fall off of, or else he'll fall into a black hole. The walkway turns into a twisting road of shrinking platforms with Star Bits, a Goomba, and a 1-Up Mushroom. It then ends at another solid platform with two of the Toad Brigade. There is another shrinking platform to the left, with a ? Block above it, and a Launch Star beneath it. The player will have to let the gravity pull Mario into the Launch Star, which will lead Mario to the next planet.

The next planet is completely made up of shrinking platforms. Once Mario lands, the player will immediately see a trail of Music Notes. Mario will have to quickly pick them all up, or else Mario will fall into a black hole. Once the player collected all the Music Notes, a Power Star will replace the black hole. The player will have to let the platform beneath Mario shrink, making Mario fall straight to the star.

Trivia

 * In the mission "Hurry, He's Hungry" of the Sea Slide Galaxy, the last planet is exactly the same, except there are notes on every tile.
 * It is possible for the player to use the gravity to fall inside the metal frame of the planet, but it's impossible to come back out without falling into the black hole.