Really cool. A little of AA and this would be perfect :D
Very nice composition. The AA is a bit overdone, making it a bit blurry in spots and there is some banding (on the tie for example). The fox's ears seem a bit rushed, as well as his spectacles. Also, I don't like the red heart in there, although that's just my opinion. Good luck with the challenge. Edit: Also, I think you could bring the color count down a bit by merging a few grays with the browns.
Oh, this is so sweet. It's like a marriage photo. :)
I like it. The colors and the style look good.
The only problem i see is the preview picture. It is not pixel art. It is scaled art of the original.
This is so delightful.