Could you horizontally flip the tree/background then put the cat back on that?
The tree is primarily illuminated from the left, and the cat from the right, and I think it makes the final image look a bit odd.
Also, maybe just a little bit of blurred shading on a layer under the paws where they contact the ground, as the fallen tree trunk's shadow is darker than the cats, and I think it would give the cat a more "solid" appearance.