The colors should be a little warmer, I think. Though it would look really good with a bit of hue shifting. You can make the black outline work for you, but right now it's fighting your piece. AA-ing it to the outline, coloring the inside lines, or coloring all the lines could help there. You've got a few spots of pillow shading on the bottom of his foot and his arm, and around his tail it gets confused. Keep the light on the top of the tail and it will automatically look more three dimensional.
Those legs look like they'll be a pain to animate. Two knees! Ack! Good luck.