Hurry-Scurry Galaxy

Hurry-Scurry Galaxy is a galaxy in Super Mario Galaxy. Whenever the Player step 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 of Luigi can't afford to stay in one place too long.

Shrinking Satellite
Mario starts out on a small walkway that turns different ways. The beginning is a solid platform witch 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. Let the gravity pull Mario into the Launch Star, and shoot to the next planet.

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

Trivia
In the misson, "Hurry, He's Hungry" in the Sea Slide Galaxy, most of the level's layout is similar to this galaxy.