This is just gorgeous. You captured the basic idea of the dog "falling" so well! And being able to do it without lines is incredible. Your shading is perfect, and you did a wonderful job making it have feeling and emotion. I really like the "fade out" look of the dog. The glowing lights are wonderful and I'm glad that you didn't over play them. Interesting lighting is very common on Oekaki and is often over-done, but you just did wonderful at putting it where it should be and not going over the top glowy! Not only is the light and shading just killer, but the small details are just wonderful and so unique! The background is gorgeous! I love jagged lines of the buildings/structures and the small math equations and symbols. As for the style, awesome! It's really great and unique and not your average Oekaki.
I would be shocked if this doesn't get a feature.