The picture and forms look really well. Also, the way you made the background a dark gradient really helps to seperate the foreground and background. So, overall it look good just a few things that need to be touched up I think.
The touch-ups to begin with the the cat play thing it is sitting on just doesn't look good. The texture of the outside and inside should have a fuzzy look to it. That brings me to the form which the door is crooked and should follow the same angle of the other lines, and inside should be square, it needs to look round ot make it all square.
Like I said before though, the piece look good and those are only a few small critiques that I notice. but, color and most of the perspective looks great.
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