The player first needs to activate the Mini-Mario and press the yellow Color Switch to the right, and then lead the Mini-Mario down the Donut Blocks on the left. Once the Mini-Mario is on the ground, the player has to lead it up a set of yellow stairs, and then press the blue Color Switch once the Mini-Mario is at the top to create a platform over a set of spikes. The player then needs to press the yellow Color Switch on the right to create platforms in order for the Mini-Mario to jump over the next set of spikes. Without causing the Mini-Mario to jump back up to the top platform, the player has to lead it down the yellow stairs and head back to the red Color Switch. After pressing it, the player needs to return to the right and press the blue Color Switch when the Mini-Mario is safely to the right of the spikes below. Finally, the player has to move down a ladder to reach the locked door, allowing the Mini-Mario to unlock it.