Incredible distortion of space. I can definitely appreciaate your shading method. It takes a lot of patience to create surreal solids just by following the lines of the surface. Reminds me of the Nightmare before Christmas, or some of Escher's drawings.
i like that you have really made it seem as if the wall is being sucked through the hole in the floor. its hard for most people to give something stationary and 2-d a sense of movement/motion but you have done that pretty effectively. nice work
hoping it is the last alternative