Damn. I like it! I love the creature's design and you did a nice job of keeping track of all the components so they flow together smoothly. One thing I would change is that the tips of the legs get cut off as they move, like there's some kind of mask at those edges-? Another nit-pick is that the shading looks a bit muddy and flat; have you tried shading with cool colors on multiply layers in Photoshop? But seriously, those are the only criticisms keeping me from faving this. Amazing work!