I personally think, for a concept, it's great. The texture placement is spot on and im a big fan of the stylized look it had going. From the drawing to where you got it, I'm really a fan. As far as depth goes, it's fine. Maybe a shadow being cast or more consistent lighting might create a little depth, but even though the sword doesn't seem like it'd be a very flat one, the concept part of it excuses the lack of any real depth. Nice work man