Use the SAFETY PIN to raise the BUTTON, and then press it (H).
Read the entry and take the DOOR HANDLE (I).
Note the location for a handle wheel (J).
Place the DOOR HANDLE on the door and pull it down (K).
Select the room.
Play the HOP to earn the HANDLE WHEEL (L).
Place the HANDLE WHEEL on the door, turn it, and enter the Corridor.