Question, is it going to be turn based or action rpg? My take, if it's turn based, then I feel the walls aren't so much a problem. If it's an action rpg, then it might be better to make some more room to move around even though it's just a tileset. I love the light effects of the flames on the wall. The barred opening is quite cool too. Cool stuff.
Real nice.
Maybe a crit?...
Not entirely sure about the height of the walls which if a brick or two higher would maybe make the scale of the human sprite read better.
Really nice and clean work with the colors and texture on the tiles here, but I feel like the human sprite is too big for that room maybe, or maybe the room is too small for it.
Great work anyways!