Good Egg Galaxy

The Good Egg Galaxy is one of the first worlds in Super Mario Galaxy. It is a galaxy which, unlike many of the others in the game, does not have a set theme such as ice or fire. Rather, it mainly consists of multiple small planetoids and a variety of different themes that usually contradict each other. Dino Piranha and King Kaliente are fought here.

Pill Planet
The Pill Planet is shaped like a giant, transparent pill. It contains many obstacles and items, mainly Coins and Item Crystals. Atop the towering planet is a Launch Star that Mario can use to break out of the Pill Planet's glassy surface. This planet contains a 2D platforming area with variable gravity.

Magma Planet
This is where the boss battle against King Kaliente takes place. It consists of a hot lava pool with a shiny tar-like ring of ground around it. The rest of the planet is just simple hot rock. The planet is quite big compared to others like the Tropic Planet, since it needs to have a decently large size for the fight to be held. Underneath the Magma Planet is a rocky area with yellow rings on it like a target.

Yoshi Egg Planet
A very small planet. The planet resembles a Yoshi Egg, and was first seen in a video at GDC 2007. The planet can be found in the mission known as A Snack of Cosmic Proportions, where a hungry Luma will await a feeding.

Geo Planet
The Geo Planet is a planet. It is a small planet where the Dino Piranha boss is battled. The Geo Planet is made of gravel and rock with hints of grass sticking out, much like a simple ball of earth mixed up together. There are Item Crystals on it with a few Coins in them.

Boulder Planet
It is a yellow planet that resembles a peanut with little grooves where the boulders have been rolling. It has about 6 boulders that Mario must dodge and or break, as seen in the screenshot. It had a different color appearance when it was first seen, but it ended up appearing with a recolor in the final game. It was originally blue.

Enemies

 * Goombas
 * Cosmic Bloopers
 * Swoopin' Poinks
 * Pokeys
 * Boulders
 * Piranha Plants
 * Moneybags
 * Chomp Heads
 * Bullet Bills

Dino Piranha
Mario starts this level on a planet with a grassy scene and a house on one side and a dark tower on the other side. At the top of the tower is a Sling Star which propels Mario into a Launch Star. This sends him to the Boulder Planet, where five Star Chips are scattered. Dodging the boulders and collecting the Star Chips creates a Launch Star. Mario ends up on a small planet with a Piranha Plant. Kill the plant to get a vine which Mario must spin up. Climb the stones on the next planet to the Launch Star. Mario will launch and slam into a giant egg, which will begin to move around. Check Dino Piranha for more information on this boss fight.

A Snack of Cosmic Proportions
Mario begins this level on the planet with a grassy field and house on one side and a dark tower on the other. This level involves feeding a hungry Luma one hundred Star Bits, so pick up as many as possible. They can be found by defeating enemies, in crystals, in the grass, and raining from the sky, among other sources. When finished with this planet, hop up the stone stairs on the tower side of the planet and talk to the blue Luma. He'll transform into Pull Stars which lead to a Launch Star. This leads Mario to a set of three planets connected by Launch Stars. The planet that resembles a Yoshi Egg is the one that holds the hungry Luma. Mario can use the Launch Stars to travel around the three planets as much as he wants to fulfill the Luma's quota of Star Bits. Talk to the hungry Luma, and she'll explode with snacky happiness and create a new planet and Launch Star. Climb up the structure on this new planet to reach the Launch Star at the top, which will launch Mario to the Pill Planet. One of the crystals on this planet covers the entrance, so smash it and head inside. This is a 2D platforming area, so head through it carefully, switching the gravity when necessary. The top of the planet contains a Launch Star. Mario will finally end up on a star-shaped structure with blue Star Chips and the Power Star in the middle. Grab the blue Star Chips to create Pull Stars, which will aid Mario in grabbing the Power Star.

King Kaliente's Battle Fleet
Mario starts on the same planet as he did on the previous two missions. The Launch Star is on the top of the house, and it is possible to triple jump directly to it, or else Mario can take the red Warp Pipe on the underside of the planet and traverse the boxy room to reach the Launch Star. The Toad on this planet tells Mario that the spiky plants hate coconuts. Kick the coconuts into the plants, and one will reveal a Sling Star. The next planet has a large Pokey, which is also defeated by kicking a coconut at it, revealing a Launch Star. The next planet has a Sling Star which propels Mario to a planet full of electrical walls. Carefully avoid the walls to reach the other side of the planet, where cannons shoot Bullet Bills. The Launch Star is in a crystal at the top of the structure on this planet. Mario will be launched onto the first airship of the game. Two creatures will shoot coconuts at Mario from an adjacent airship. Spin the coconuts back at them to kill them, which lowers the bridge between the two ships. The Launch Star on this airship takes Mario to King Kaliente's planet. See King Kaliente for more information on fighting this boss.

Dino Piranha Speed Run
This level is the same as the original Dino Piranha level, except that you have a 4 minute timer to beat the level. As long as you know what to do and don't waste time, it should be pretty easy to beat it within the time limit.

Purple Coin Omelet
In this level, the player has to collect 100 purple coins to get the Power Star. Mario must traverse through the galaxy and collect these coins using launch stars. This purple coin challenge is straightforward, and the coins are clustered in group or rows, as opposed to the scattered purple coins found in latter levels.

Luigi on the Roof
Sometime after Mario saves Luigi from the Ghostly Galaxy, Luigi will go out to the Good Egg Galaxy to search for a Power Star. Shortly after, the Mailtoad informs Mario that Luigi is lost and shows Mario a picture of Luigi's location. Mario needs to go to the first level of the Good Egg Galaxy and needs to get Luigi on top of the roof of the house. This is done by going to the bottom side of the first planet and then jumping in the yellow Warp Pipe and then into the next yellow Warp Pipe. Luigi will give Mario his Power Star. Alternetivly, Mario could simply use a backflip jump coupled with a wall jump and star spin to get on top of the house much easier.