The dust is really excessive and blury, it should look more like dust, that means less blurry and more transparent, the walls have a really low resolution. I dig the posing. Also i would recomend you to start placing shadows on the characters. Keep up, you are improving very fast.
The feedback is really helpful and positive, thanks. But, i have no clue what so ever to add shadows
This sexy motherfucker will help you.