first, I never ever write a critique, so this may be short and not so well written, but anyway...
everything looks great, though the "light shading" on the cat isn't exactly on the cat. I mean, some of the shading is on the grass and not on the cat. this may be for a reason, and if it is, then maybe you could do something with it, because it bothers me a little bit.
the grass could be darker where the moonlight doesn't reach it. I know there is a shading, but if you made another layer and made a darker shading, that would be a little bit better. but, it looks good anyway
I don't know what else to say... the sky and the shadow of the cat is very good
hell no, everything looks epic! good job! ^^