Lovely white on white - nice sharpness - and I like the overall composition. This would fit well into Paul's challenge idea of fill the frame with face!
I like the fact that you went for a tight shot. A faster shutter speed would've helped you achieved better lighting (so the side of the cat doesn't wash out) as well as more sharpness. Also, I wouldn't have cropped off the tips of the ears.
As an added note- I really like the cat's expression. Very non-chalant.