I think you need to have a look at the scale of some of the items in you scene. The handles on the bed? look way to large and I think you need something in the middle of the room as I look around the scene there is nothing to hold me there, no focal point. Perhaps consider a rug on the floor with a few props, there is a music stand but no music papers or instrument. There appears to be a window but there is no detail on it consider adding a frame work and a lock. For the lighting I assume you are going for a dimley lit room prehaps consider a tv other than a random light source in the room or maybe a door slighly open.
This could be a great scene but I feel it lacks planning or direction. Perhaps do a few sketches of what you want or at least grab a few images from google that roughly represent what you are trying to achieve.
Every scene should allow the viewer to imagine a story behind the image your trying to show them.
Dont give up, your doing great, just need to plan a little. Hope I havnt put you off too much.
[edit] appologies I hadnt noticed the latest update before posting, but I still stand by most of what I had said. I hate the way this site hides images if you upload them
[final edit I promise] perhaps out side the window you could have a really creepy tree silhotte`d bu the moon, would suit the scene quite well.
