Use the LOOP GRABBER on the hook. Take the QUARTER 2/2 (H) and examine the diagram.
Use the LOCK PART on the desk and select it. Place the DIAMOND in the ring; take the EARTH TILE (I), and DIAMOND RING (J).
Place the 2 QUARTERS in the coin slot. Open the upper left compartment. Take the FIRE TILE (K).
Go to Buildson's Office.
Place the 3 FACE TOKENS on the cabinet lock. Take the SLIDE 1/5 (L) and read the diagram.
Examine the window frames to access a HOP (M).
Play the HOP.
You receive the TOWER TOP (N).