Well.....you could take a lot of time....experiment...try new things...and the bottom wing bring it up a little lower than the 1st wing...

Do more shading ig...

WOW this looks wonderful so far! lol love the title! I agree with lily btw. the wing should be turned more or you should have the legs more up ward to give a gliding affect :3 but really good otherwise *w*

Looks great!

The anatomy is pretty good! Though if do want to improve on it..
My suggestions is look at the wings of a real live animal from perspective. As for the rest of the body it depends on wether or not the chest moves into the body. Same thing look at pictures of real live cats. :)

For shading I suggest useing a color to shade, -don't use black. The reason I like color better is it makes the whole painting pop even if the anatomy is a little off. This is just a style preference but I usually like to out line inside line art with white.

Hope this helps. :)
(If you have anymore questions I'll be happy to answer them. :D)

This looks awesome so far! Critique? Umm, maybe make the back legs a bit farther from the front ones?

(Whoops posted that comment too early!) Another thing you could do is make the wing joint for the tip wing a bit further down, maybe. (Or make the body a little longer, they're kinda snakey haha.) But again, this looks really good as it is!