David S. Rodriguez:

This is great, but I think the skull could be pushed closer to the camera, making us more uncomfortable with the more macabre setting. Still, everything else works and great job with this piece.

Richard Clark:

Your characters lack weight to them among other things like strong poses, secondary motion, overlap, etc. Think of the "bouncing ball" exercise. Most animation comes from that simple animation. I would master those simple exercises before moving on to human performances