For criticism:
I think the body proportions are way off, particularly with the hands/forearm/head sizes and lengths to degrees of glaring awkwardness; you don't need to hit 1-1 accuracy or realism but basic construction/anatomy would ground the style in a more appealing manner.
As for the animation, the most glaring and un-needed thing is the smear/blur frame between the poses, for such a small action it over exaggerates the motion. The right arm suffers form a lack of easing and a lot of even spacing between the drawings throughout its actions, other parts of the body have these flaws but that area most of all. It's not perfect but the overlapping action of the hair isn't bad, so props where props are due, but that brings up another really glaring flaw in the piece; the boobs.
These titties are being pulled by some gravitational field man, the hierarchy of motion would not dictate a movement that rapid/excessive, try to think about the weight of the masses and how the proper forces of the body would make them swing. Also try to reduce the distance of the jiggle after each bounce as they go into resting position, you could check out some porn for natural breast physics or even look at the artist Manyakis who has fairly nice weight to his beefers.
I do dig the design and the atmosphere in the piece and I can see what you're aiming for with it, so I look forward to seeing you grow and improve over time!