align the stones so that a path forms connecting the path wich is started on one side and finishes on the other...
Then use the disk box to capture the rat and place him one the path..he unlocks the door...
Gotta move the chair over so you can reach the bridge to pull it back down
if you havent re-arranged the fllor tile to make the rat pop his head out of the hole in the wall...you need to do that first
