If I can be nitpicky, the lettering for his name needs some sort of an outline, it blends in both with the other letters, as well as Nabby (most notably the dot on the I looks really odd on top of the V).
Very well done though! I would definitely love to see more of your work
On a side note, when I clicked on your pic, a popup appeared that was blocked by the filter here at work. Not sure if it was something that was NSFW or not, but thought i'd give you a heads up on that