Final Concept resolved

Increased height for a better perspective

Added texture and tone in wheel chair and extra light

Changed shape of window

Added extra window and lightened the wall of shadow to show something peering through

Added shadow in the corners and green highlight
(Final)

I have worked back into the concept to show a clearer understanding of where objects will be placed within the scene and lighting. I have also worked back into the wall of shadow so that something is emerging through the darkness.