Floor 2

You'll start on Floor 2 and immediately notice some spikes blocking your path. Don't worry, Link can't cross them, but Phantom Zelda can! Have her move north, past the spikes, and hit the switch on the other side. This will lower the spikes, allowing Link to follow.

Once you're on the right side of the spikes, head south. You'll find a door and two switches. Have Link stand on one switch, and then have Phantom Zelda stand on the other. This will open the door, letting you proceed. These early puzzles are pretty straightforward!

Now, be cautious as you move through this southern passage. There are Rats here, and Zelda, even in her Phantom form, is still wary of them. Take out any Rats that appear and then push or pull the nearby block in front of the rat hole. This will prevent any more Rats from bothering you.

After dealing with the Rats, have Phantom Zelda cross the spikes. She'll spot another Phantom on this side. It's just standing there, so it should be easy to distract. First, have Zelda hit the switch located behind this Phantom.

Next, have Phantom Zelda talk to the stationary Phantom, either from the left or the right side. While she's distracting it, quickly have Link sneak behind the Phantom and make your way up to the staircase.

Finally, call Phantom Zelda over to you so you can both ascend to the next floor.