World 9-1 (New Super Mario Bros. Wii)

World 9-1 is the first level of World 9 from New Super Mario Bros. Wii. This level is sky-themed and is unlocked by collecting all of the Star Coins in World 1. The level uses the background of World 1 and World 7 and plays the athletic theme. Like all levels in World 9, there is no midway point.

Layout
World 9-1 is an athletic level that is similar to World 7-1. The level contains a number of spinning rectangle platforms around the level.

The level begins with some Koopa Paratroopas, along with a ? Block above a pit. A section with Goombas and Koopa Troopas follows, along with another Koopa Paratroopa. The first spinning rectangle platform is found, followed by two more with ? Blocks with Koopa Troopas on them floating above. A Koopa Paratroopa is found, along with a yellow rectangular platform and three Koopa Paratroopas. More spinning platforms are found, along with multiple Koopa Paratroopas flying in between. A section of ground with a Koopa Paratroopa is found, followed by a spinning platform and two Fire Piranha Plants. More spinning platforms with Fire Piranha Plants in between are found, along with two Fire Piranha Plants that block the player's path. More Koopa Paratroopas are found with a spinning platform, followed by the flagpole.

Star Coins

 * Star Coin 1 (pictured): The first Star Coin is floating high above a platform with a red Koopa Troopa. Mario and co. can reach it either by jumping off of one of the Koopas, or by using a Propeller Suit.
 * Star Coin 2: Soon after the first Star Coin, the second Star Coin is floating high above two Koopa Paratroopas and three rotating blocks. Mario and co. again must either jump off of one of the Paratroopas, or use a Propeller Suit to reach it.
 * Star Coin 3: After the second Star Coin, there is a long green Warp Pipe with a Fire Piranha Plant that leads to a secret area. Mario and co. must get on the rotating block and jump from it to a platform on the bottom right, which the third Star Coin floats over.