Is that picture of the cyborg ninja yours aswell?
it looks good.
Anyway for the set:
i think the feet are to red.
Front of the torso lacks red to me
If you could turn the hands into.. well.. hands.. that will be cool.
I kind off like the head but maybe you got to put the eye abit higher on the head.
i liked very much the body at its most. It shows hard work and that u dedicated time to it. Perhaps, the only things i didn`t like much are the head (in the center specially and the far away eyes) and the feet (different red tone) apart form that, very good.
Meh. It lacks shading, makes it look very un-proffesional. Also, add some color. The picture you used as a reference has color too.
Most parts have random shapes slapped onto there too, I'd make them look more like the muscles they're supposed to represent if I were you.
Idea is nice, but it's not executed all that well.