Wind-Up Tower

Wind-Up Tower, or Layer Cake Desert-, is the tower of Layer Cake Desert in New Super Luigi U. It is unlocked by completing Piranhas in the Dark or Underground Grrrols, and its own completion unlocks the path to The Walls Have Eyes.

Layout
This course includes screws that the player can spin on to access stone blocks, which the player can use as stairs to advance through the level.

Star Coins

 * Star Coin 1: After winding up the first screw, the player must hop onto a small rectangular block and grab the first Star Coin before the other blocks close in on it.
 * Star Coin 2: After winding up the second screw, the player must grab the Star Coin that is next to the third block platform from the bottom before it moves back into the wall.
 * Star Coin 3: After winding up the last screw, the player must quickly make their way up the tower using the blocks as stairs and grab the Star Coin (located beneath the door that leads to Boom Boom) before the blocks close in on it.

Luigi Sighting
An 8-bit Luigi can be seen standing behind a moving block on the left side of the screen.

Enemies

 * Dry Bones
 * Boom Boom