This work is awesome example of animal walking animation. The movement is very nice and anatomically correct. Synchronization of front and hind legs well done as well.
I find it hard to actually find mistakes, as there are no apparent. I would only like to point out the muscle under hip of hind leg (I'm sorry I don't know its name in English) seems to 'twitch' a bit as the leg moves forward. But it's really just a little unimportant flaw.
Since this is just a work in progress, we can't expect any extreme graphic experience. However the work in it's current state is technically perfect and I can't wait to see how it will progress.
As expected, your animation style and anatomy is absolutely wonderful!! ^^ One thing though; when I look at the way Lunewen is walking, it looks more like a horse than a cat?
This seems to be mostly because of how much the head and tail are moving- I'm not an animator by any means, but just looking at this video: [link] (I assume you're using some sort of big cat for reference, so I tried to find a good video of the animal with the closest anatomy.) One of the major differences is that the cheetah's head and tail are nearly immobile while the legs move. In your animation, the head bobs as if it is rather heavy, and the tail kind of whips around, much like a horse.
I'm not sure if these details were intentional, but seeing as Lunewen is technically a 'fantasy species,' I don't see any problem with keeping the way it is. The animation right now is currently pretty awesome, and there's really no problem with a little extra movement to add character to the...well, to the character. XD
Keep up the awesome work, Lunewen!! I'm a big fan ^^
Arf !! I didn't thought that her dancing head would look like horses XD Perhaps I'll calm the movment of her head for the final picture. You'll see here on what she's dancing : [link] I think to change the tail movment too, because with her moon, she can't move like that keeping natural and a little realistic effects. I listen your precious advices, thank you very much !!