I never spoke up before...so I guess it's time I say something.
First off.. I love the carpet

especially on the stairs, it looks really good.
I don't like the shading on the wood, though, it seems awkward.
With the Shelves...
The bottom part of it looks great, but on the shelves themselves it doesnt look right. The broken black line makes it look grainy and wierd.. mostly because its so dark along the line and then not any darker right above it. It should be darkest right below where it turns to the next shelf...a fade to dark brown as the shelf goes further in with black pixls on either corner where it would be darkest.
Also on the shelf the outlines are broken. Keep theblack linel throughout the whole outline
Again, keep a solid color outline and I think it would turn out better. If you don't want black, just chose another darkish color. (with the bed, the table, and the chairs). Also, some points seem like they could use another color to AA the work a little. The wood could use one more color for the woodgrain texture (you currently use 1 for it) And the bed...maybe one more would help, but I don't know...The Bed pillow and sheets just seem like they could use something.