Captain Toad finds himself on a cylindrical planet surrounded by clouds. The planet is divided into three individually rotating sections with platforms on them. Stand on them away from the center to get them to spin. Be careful, as you can easily fall off the planet this way. Spin the middle section to find the first gem. The second gem appears on the middle section on one of the blue platforms. Line up that platform at the top, as well as one next to it so you can go through the blue pipe and cross the other platform to get it. Spin the platform closest to the blue pipe until a hole appears in the side. Use it to drop down to where the Toad Brigade is. Blue Toad will give you the third gem. Return using the red pipe. Spin the middle section until you come to a solid platform (not one with a hole in the middle) and stand on it, letting it drop down. Before you fall off, go to the nearby cloud. In front of the red pipe is an invisible Gold Mushroom. Grab it and return through the red pipe. Line up platforms for each section to make a path to the Star. It doesn't have to be perfect. You'll hear a chime when the platforms line up. Go through the blue pipe and run across the platforms to the Star.
Special Challenge: Find the hidden Gold Mushroom.