You know, when I saw this challenge this was exactly what came up in my head. I didn't participate by the way. When I think of an empty room I think of solitude. I feel that you succeeded very well in expressing this. Great mood, I really love the emotion you captured here.
Very good use of an empty chamber...I think the person sitting would have more impact....makes it feel like the person has been there longer than if they are just crouching.
Cool picture.
The emotions that comes in me is loneliness, fear and being left alone and they together comes with a very impressive photo all in one.
The only error is the lack of perspective corrigation (on the roof that is a little bit harming).
Great feeling, congrat!
Nice job of compositioin and perspective. The only thing I would change is to darken the far end of the room so it wouldn't compete with the subject for the viewer's attention.