This is such a great shot! I think it was certainly underrated. It immediately establishes such a foreboding mood. Love the tones and composition. (I scored it an 8 in the challenge.)
you have that this is stairs, but I see no stairs in the photo. That's very misleading. The photograph is missing something, perhaps a zombie climbing the invisible stairs.
Hope that's not lead paint:) Very eerie. Like the diagonal line created by the tiles. I wonder about the choice of cropping bottom of the door? Can't decide how I feel about that. Love the blue cast. Good job.