Passage Way Central is the eighth Chamber Dungeon unlocked in the game. It one of four of the 'Level 2' Chambers.
The chamber dungeon is unlocked after Link completes the Treasure Vault dungeon. The dungeon has four tiles already placed, but there are also two treasure chests as well as two tiles that require locked doors. Two of the areas are separated in the top-right and bottom-left corners, requiring Link to place tiles with Staircases to connect the different areas of the dungeon.
Link will earn a Piece of Heart for arranging and then completing the dungeon. Completing the dungeon is also part of unlocking the Stair Decisions. Link will need to also complete the Face Shrine in order to fully unlock the dungeon.
You've done one kinda like this already. This one's the same idea but trickier.
Hope you've been paying attention to the challenges. It all comes into play here. Let's see what you got.