Hi! I like your rough painting style and use of perspective.
Though I think the perspective is a little off, it looks like the hallway is going upwards too fast and tilted. I did a paintover:
- Try to use a vanishing point (red lines) to stay true to realism.
- The light direction was also off (yellow lines).
- The light could be much brighter with a glow, also bouncing off more elements in the painting.
- Use some vignette (dark soft circle in the corners) for depth.
Good luck 
