it looks too bright for my taste. Would be nice if you could see some light falling through the windows. Also the texture on (especially) the left side wall seems to be a bit off. Like it is stretched or something. And it seems to be a bit generic. You'd need some cracks and stuff. Traces of people having had a hard time in that place, someone countung down his days, dirt, smearmarks etc. Just some ideas to give the whole scene a bit more of a history.
In general somehow the composition of your scene seems to be to structured and organised. like all the windows having the same distance, the beds being in a straigt line.
Sorry if I am to harsh, I try to be constructive at the same time.

good luck