I would like to have seen a little more light on the right side of kitty. Too much is blending into the background. Also, it looks like your cat is about to speak, lol.
4 - Bigger (640) and sharper/less blur and the grain/something minimized bringing in more clarity, make this better in my opinion. Good potential, lighting looks nice. A little more space at the top too.
Nice looking cat. Unfortunately the softness in focus and the muted colors arent working for me. Takes away from the deep color that I am sure this kitty is. The lighting contrast between the eyes feels a bit uch as well but maybe just because of the color over the one and lack of color on the other.