The fact that you were able to get this cat giving a 'Gerry Alanguilan' rape face makes me love this picture twenty times more. @.@ Oh, if you don't know who he is, here's what I'm talking about. [link]
I like how the cat's expression gives off that impression in this piece. The way there's a bit of light reflection at the bottom of the piece adds depth, and the way you've centred the cat makes it even more profound, overall.
I do feel the colours contrast well, and that the colours of the background and cat complement each other so much that it makes the contrast even more potent.
It has a feeling of flash to it... which I'm not really fond of, but it's more of a personal preference than anything. A vignette wouldn't hurt, though.