I was stuck on this level because I was missing a piece of furniture and a piece of evidence. So I decided to write a guide.

The east wing consists of the yellow room and the red room. The yellow room has an upstairs area reachable by a ladder (the small lamp in front of the ladder belongs upstairs).

None.

• Goat statue: on table in yellow room -> upper passage (pedestals with animal statues)
  
• T. rex bone: yellow room toilet -> central exhibition, T. rex
  
• Hands statue: red room on one of the floating pieces of furniture -> west wing, statues room

The west wing consists of the tape room, the bandstand (linked to tape room by a short passage, the door opens only from the bandstand side), the statues room, the tapestry room, the maintenance area and a walkway to the upper passage.

Some of the harder to find pieces of furniture to move:

• picture on the wall in tape room next to door to bandstand. easier to place if you jump
  
• drum in the short passage between tape room and bandstand
  
• ring sculpture on a display case in tape room -> statues room
  
• knot sculpture in front of tapestry room belongs on the pedestal there (needs to be righted)
  
• mannequins in bandstand need to be righted
  
• tape room: quite a few pedestals need to be moved
  
• statues room: the mask sculpture

• dagger: in the back of the body on the lion statue, statues room

• T. rex tail bone: bandstand -> central exhibition, T. rex
  
• T. rex hand bone: on lion statue, statues room -> central exhibition, T. rex
  
• painting on walkway to upper passage -> upper passage, it only fits in one place (notice the frame)

Quite a few paintings are missing here, three of them are in the upper passage themselves.

None.

• T. rex tail bone: lying on the floor -> central exhibition, T. rex
  
• yellow chair: in central paintings area -> east wing, yellow room

Consists of the maze room, the duck room and the triceratops room. There is also a small passage accessible through the stairs in the duck room. There is a body with a T. rex bone at the end of the small passage but technically the bone (even if retrieved before the body falls) belongs to central exhibition and thus is not a misplaced exhibit piece.

• katana: stuck in one of the bodies in the duck room
  
• sword: stuck in one of the bodies in the duck room
  
• note: small passage, in a box next to a body
  
• shield: on body in maze room
  
• toy gun: behind triceratops

• T. rex bone: stuck in the body in the maze room
  
• T. rex bone: on the floor near one of the bodies in the duck room
  
• red chair: in the maze
  
• red chair: duck room, corner
  
• egyptian head statue: triceratops room -> west wing, statues room
  
• ball sculpture: maze room, in one of the basketball hoops -> sculpture room
  
• feather sculpture: duck room floor, be careful not to sweep it away, it belongs just outside the duck room on a pedestal with two other feathers

Has to be entered on the upper floor from upper passage to open the door on the lower floor to central exhibition. Be careful when you sweep because you might slightly move chairs which then have to be moved into a proper position again (but which can be hard to spot with cleaner sense because they are almost correctly placed). Also, there are two types of chairs which are not placeable interchangeably.

Some of the harder to find pieces of furniture to move:

• two of the small tables that need to be placed are stacked across from the bar (and do not look out of place there)
  
• you will need to move one table from lower floor to upper and one chair vice-versa
  
• one chair is outside the lower floor cafeteria entrance

• phone: small table across from bar
  
• bets sheet: on bar

• yellow computer chair: behind bar -> east wing, yellow room
  
• guitar: behind bar -> west wing, bandstand
  
• red chair: lower entrance -> east wing, red room
  
• painting: near lower entrance -> upper passage

Left/right of T. rex relates to standing in front of the large T. rex in the center.

Some of the harder to find pieces of furniture to move:

• quadratic painting: behind the small T. rex statue left of T. rex, belongs in paintings section
  
• quadratic painting: entrance to triceratops room, belongs in paintings section
  
• jaw of T. rex: directly beneath it
  
• fire extinguisher: behind T. rex and to the left, near toilets, near door to duck room: belongs in its case on the wall left of door
  
• T. rex bone: "illusion passage" outside cafeteria
  
• T. rex bone: stuck in a body in the small upper passage accessible from duck room (may fall down with the body when sweeping nearby)
  
• dinosaur egg: right in front of the pedestal that already has two of these
  
• ichtyosaurus statue behind T. rex must be moved
  
• wall display with avian dinosaur next to T. rex must be moved
  
• painting left of yellow room doors is askew
  
• paintings area: big painting must be moved, one of the missing quadratic paintings is lying there

• dagger: body in front of small T. rex statue left of T. rex
  
• game rules: next to T. rex

• painting: front of statues room entrance -> upper passage
  
• head statue: on pedestal with feathers, right of T. rex -> west wing, statues room
  
• red chair: next to T. rex -> east wing, red room
  
• head sculpture: top of stairs left of T. rex, to the right of a smaller T. rex -> west wing, statues room
  
• yellow chair: near T. rex
  
• part of drum set: right of T. rex -> west wing, bandstand
  
• spiky ball-like sculpture: in front of entrance to statues room -> west wing, statues room
  
• yellow globe: right of T. rex, on a pedestal with two dinosaur eggs -> east wing, yellow room

• yellow room upstairs
  
• bandstand
  
• lion statue, statues room
  
• under small T. rex statue left of big T. rex
  
• duck room (#1)
  
• duck room (#2)
  
• maze room
  
• small upper passage from duck room - may fall down to central exhibition when touched
  
• cafeteria, behind bar
  
• triceratops room, behind/to the right of triceratops

• Kokko Kann (red room, next to radio)
  
• Garbage Band (bandstand, appears after you enter, light goes out and music plays)
  
• Roma (small upper passage from duck room, in front of the box with the evidence)
  
• Economy of Pain (in a mannequins hand after you solve the katana secret)

In the tape room, there is a yellow tape high on the wall. You can interact with it by climbing on the transparent tape boxes (interact with them to open them). You may need your ladder to reach the first tape box. Interacting with the yellow tape opens a sliding wall left of it.

In the maze room, there are TVs with colored screens in one of the corners. Interact with them so that the top row (left to right) is pink, grey, green and the lower row orange, blue, grey. A door to the right opens, take the katana and slash the mannequins to leave the room again.