Very well composed and excelent exposure, so technically it is good. Now, you probably would have been better off with a different crop, more of a standard ratio rather than square. Square format is one of the most difficult to compose and it shows here, look at the top. The crop is way too close to her head, making her look like she's trying to fit in the frame rather rest her chin on her knee. If you were to have it cropped as, say, 11x14 with her slightly off center, it would give room for her head inside the frame and create a focus on her emotions in a empty room.

Personally speaking, I think you should try b&w film with a bigger camera, like an SLR. With one of those you could control the depth-of-field much more, as well as your crop. This is just my opinion, but I haven't found digital to be, in any way, a substitute for b&w films.