A couple of notes.
Two things could -hugely- help make this look more professional. First: On the segments where you've motion tweened the limbs against the body, recolor them so the shading is much closer between the objects, and fade it toward the top of the limb to an identical shade. Increasing the brightness of foreground objects is a valid technique but you're overdoing it. Secondly, where you ramped up the transparency of the same object to represent a reflection on ice, the points where the separate motion tweened segments overlap is painfully obvious, and it looks really sloppy. If you don't have the time to fbf those segments (that confuses me, slightly, it looks like you did for every shot except when the character was presented in profile), then use an opaque image tinted the color of the ice, not a transparent one. You should be able to get the color the same with some tweaking and you won't end up with the dark areas on all the joints.