Aww, cute! I'd have given the dragon a slimmer body and larger wings to make it look more like it actually can fly, but apart from that it's a very nice picture and I like all the details in it! Lighting and shading is nice too!
The ONLY thing that I can find at all not perfect about this image is that, in some places, it looks like the characters are simply stuck on top of their background, rather than in the actual room. I don't know how to explain it, let alone 'fix' it... Anyway, that's a really obscure little thing, with 99.99% of this being pure awesomeness.