The Cog Maze is an area accessible from the Construction Frame Building.
The Cog Maze is a teleport maze consisting of floating gears of various sizes, serving as platforms. Rotating Phillips-head screws on each platform act as portals between other gears.
A slightly shorter screw on a platform to the northwest leads to the Construction Frame Building.
Another screw leads to a slightly darker area, with what appears to be a sign on the floor, which, upon interaction, shows a fullscreen image with the text「白昼夢」(Hakuchūmu, Daydream). This also unlocks a new book in the Library, containing the same image. Also found here is a bent screw, which unlocks Menu Theme #9.
Another shorter screw exists deeper inside the platform maze but currently teleports you to itself - effectively a dead end. A platform in the west constructed of three cogs with one screw in the middle contains a walking mannequin, which will take you to Nail World.
- Before version 0.113, the bent screw served as the initial connection to the Forest Pier, and thus, the start of a great adventure. Upon interaction, a small cutscene would show that the shortcut from Urotsuki's Dream Apartments to the Forest Pier was now open.
- The "Daydream" image shown by the sign in dark area used to be located inside a building in the (now nonexistent) Cosmic World.
- The Menu Theme found in this area used to be located in the Forest Pier before its removal.