Ever thought of coloring it? Darn this is good, and i can tell you didn't use 3d animation software, just 2d, and it still looks 3d! Actually this is 4d, because time passes while the animation is played, if it were just a still image it would be 3d.
Oh man, my head hurts just of thinking you made this kind of 3D turning on EZToon. I can't see to do any progress with it. D: Congratulations!
And BTW, I had a little difficulty figuring out what was happening, probably because of the lack of colors and stuff; if the upper part was darker like in BenVlodgi's mapping, this could be way clearer to understand in your monochromatic animation. Just an input about visualization, you rock!