Everything here is just making me go
mmmm yeah
but the animation really is not up to par with the rest of the stuff. I would like to, very much, recommend the animator's survival kit for looking up some animation know-how!
Basically all of the animation right now is very linear - every part more or less moves the same distance between frames. This creates a very stiff and floaty motion. I guess it ended up like that mostly because you've been inputting a few keyframes and let the computer do the tweening. In my experience, for tweened animation to look good you really need to get down and dirty and get a much higher number of keyframes in there.
Like, in the run, let the foot go fast as it touches the ground, then slow the motion down as the foot is behind her, speed up a bit as she puts her leg forward again, then a bit of slow-down again. Then quick.
I feel like I could go more-in-depth with this, because animation know-how is good, but I'll have to save it for later.
Despite any eventual harshness, I'm just saying this because everything besides animation is REALLY SERIOUSLY VERY EXCELLENT. So naturally, I want everything to reflect that level of rad-as-fuck