Very awesome work. I actually like the cartoonishness (Not a real word) and how it contrasts with the rest of the piece. The only criticism I would give is that the lightning trail's angle seems a little off, as if he was raising the sword from a point farther away from himself than he could reach, unless of course he's intended to be running in which case I feel you could express that a little better. Just the opinions of a non-artist. I do really like this piece overall though.