Yep, I am with eishiya and curly, it is much better. Those tiles directly below the green ones, which look like they have some kind of statue carved in them, I would try to make them as dark as the darkest portions of the stairs. I would keep about that level of value for all walls.
Also agree with eishiya in the shadows on the stairs, they should zig-zag between being 45° on the horizontal-bright portion of the steps and 90° (vertical) on the darker portions that are vertical.