The art is a bit hard to really judge. It's no usual shounen action fare, for sure. The main character himself has a somewhat strange countenance in my opinion (not altogether evident in that screenshot). Generally the style and art is closer to some seinen shows (not overly cute), though enemy grunts seem often enough drawn very ugly or caricatural. Animation, in action scenes, was half way between fluent and artsy. No problems as such with the animation otherwise.