Nice drawing. I like the thickness of the lines,but the lack of line-work in some places is a nice touch, and I think as an artist, knowing where and where not to put lines is a very hard skill that I appreciate is almost demonstrated here. But a thing that bothers me is how instead of putting no lines, you put very thin ones instead. For some reason this inconsistency bothers me, and I think you should either make the line thicker or take it away. But otherwise, everything else is pretty good.