It's awesome
Don't have much time to comment but:
Love the shading
Favorite part is the face that you can see. Really dark and looks great.
What I don't like is how the top and bottom varies so much.
Also, I think you forgot to mirror one part in the lower back
For the lower two circles, they are a bit close together. Looks like they are merging.
Might wanna flip so the back is in the center and round out the angles at the seam.
Love the tubing look. It would be awesome if you could make a slower spin of it (more frames) and then maybe a higher framerate too.
like 200 frames, 50 ms between each?
g2g