A Snack of Cosmic Proportions

A Snack of Cosmic Proportions is the second mission of Good Egg Galaxy in Super Mario Galaxy. Mario (or Luigi) should collect 100 Star Bits to feed a Hungry Luma to access a new planet.

Layout
Mario lands on the Starting planet and finds two Electrogoombas. The bottom of the planet contains Goombas, Slurples, multiple crystals containing Star Bits, and a single ? Block filled with Star Bits. Meanwhile, a constant comet stream releases Star Bits. Mario should find a twisted pathway to reach a Luma that transforms itself to a series of Pull Stars. Using these Pull Stars, Mario should use the Launch Star, which will take him to the Pear planet, which is part of a network containing additionally the Egg planet and the Rock planet. On the Pear planet, he can find Goombas, prickly plants, and crystals with Star Bits. One Launch Star takes him to the Rock planet while the other Launch Star takes him to the Egg planet. If Mario has fewer than 100 Star Bits when launching himself, ten Star Bits will appear. Once on the rock planet, Mario has to avoid Boulders and find crystals containing Star Bits. A single Sling Star allows Mario to grab three more Star Bits and a single coin. Mario can use a Launch Star that leads to the Egg planet or another Launch Star that returns him to the Pear planet. On the egg planet, a Hungry Luma asks the player to feed it 100 Star Bits. The Egg planet has a couple of Goombas and more crystals with Star Bits. The Launch Star here takes him to the pear planet while another Launch Star that takes him to the rock planet.

Once the Hungry Luma has eaten 100 Star Bits, it transforms into the Tower planet, leaving a pink Launch Star behind, which allows access to the newborn planet. Mario has to climb the Tower planet, which has prickly plants and Goombas. He can also break the crates on this planet by spinning them. After reaching the top of the Tower planet, he can use a Launch Star to visit the Pill planet. The Pill planet's exterior has some Electrogoombas and many crystals with Star Bits. An empty crystal blocks an opening on the planet, but Mario can destroy it to enter. The interior is a circular 2D-side scrolling area with varying gravity. The background color of the gravity field indicates the gravity's direction: blue indicates downward gravity and red indicates upward gravity. At the top of the planet's interior, Mario finds three Goombas and a Launch Star that takes him to the final planet, the star planet. On the star planet, Mario can collect five blue Star Chips to make five Pull Stars appear. Using these Pull Stars, Mario can finally grab the Power Star, ending the mission. Alternatively, Mario can Long Jump or backflip to the star without needing to collect the Star Chips.

Trivia

 * There is a Star Bit meteorite that spawns only when the game is being played in standard (4:3) ratio, and as a result does not spawn in Super Mario 3D All-Stars.