Doesn't ring a bell. Travel is limited, and it appears no one can leave the premises, he can't be far.

[ One of the first things he tried to do was leave as soon as the setting twisted. Everyone was trapped here, purposely. ]

Mobility is limited between the rat-like creatures and animated lockers, but he should have an easier time maneuvering if he's a kid.

[ Probably not the most enlightening thing that could be said, but he was only being logical about his statement. ]