There's a Fighter enemy dancing in the background as you appear in this stage. He'll jump to the foreground momentarily, or you can head right and stand on one of the glowing platforms that looks a bit like an open cardboard box. It will warp you to its mate in the backdrop. From there, you can head right and through a doorway.
Now you will fall down a narrow shaft. The wall to your left begins moving toward the right, and it has spiky tips that mean you don't want to get too close. Rush down the passageway, staying ahead of it and defeating enemies. The Fighter ability is useful for this. When you find gray blocks in a checkered pattern, break through the top row for an easy Keychain as you keep moving. A short distance right from there, you will ascend a shaft and head right before dropping down. The wall keeps advancing the whole time. To your left, note the twin yellow blocks. To their left is a 1up doll. If you hurry, you can get through it ahead of the moving spike wall. Then head right to reach another glowing platform that in this case warps you to the foreground. There's a barrel with food to your right, or you can go left and enter a door.
In that next chamber, you'll find yourself running left now as a wall closes in from the right. There's a Fire enemy nearby, so gulp it down and then you can make blazing dashes as you head left to a platform. That platform takes you to the foreground, and then you need to rush right as quickly as possible. You will find a barrel you can destroy to reveal a door, or you can float up to a higher ledge where another barrel waits. That one also hides a doorway.
Enter the doorway in the upper right barrel and you'll find a cannon. You can blast toward the upper left to break through a passageway, then blast up through another passage and you'll see the Rare Keychain: Drawcia hanging in the air. To hit it, you have to tilt the cannon one notch to the right of the far left position. That'll launch you along a path that allows you to capture your prize. Keep ascending from there and you will also find the stage's first Sun Stone. Then you can exit through the nearby doorway.
In this area, stepping on platforms causes them to layer while a corresponding platform in the background rises. You'll need to make your way along the hallway, using platforms or just floating. Watch for the cannons in the background.
Near the right side of the area, you'll find a 3D Warpstar near one of the platform pairs. There is dynamite in the backdrop, and to the right are a higher and lower shaft, both blocked by large blocks. You need to use the dynamite to clear them. You can raise the ledge in the background high enough that you can pass just barely under it and grab the dynamite. Then pick it up and hop up so that you're standing on the weighted platform. Stand there until it dips as low as it will, then hop right and ride the 3D Warpstar to the foreground. Hop quickly across the raised platform and up onto the overhead ledge, and plant the charge in front of the block in the overhead passage. When it explodes, you'll reveal a Sun Stone. Now you can continue right and descend a pair of ladders.
As you arrive in the lower region of the chamber, an enemy in the background chucks bombs at you. To the lower left, there's an enemy you can inhale for the sword ability, and you can hit a bomb block to destroy the blocks he is guarding for an easy Keychain. Then you should head right and do the same there to reveal a doorway. Pass through it.
You are now running from a series of the moving walls. There's a flying enemy you can gulp down here to obtain the Wing ability, which makes it easy to rapidly flap your way forward and around obstacles. Just go back and forth, staying ahead of them and avoiding enemies. As you rise ahead of the third wall, you can break through some blocks to enter a nook and grab a Keychain if you like, on your way to the platform that will warp you out of harm's way. As you continue advancing, watch for a doorway you can exit to leave the area. It's at the base of a vertical shaft, but you shouldn't enter it. Instead, fly up the shaft to find a higher doorway that you can enter to reach a puzzle chamber.
In this chamber, pull a lever on the ceiling to destroy some blocks, allowing you access to the stage's final Sun Stone. Then continue right and hop on a platform to warp to the foreground. Head left from there a short distance to reach the goal door.
