I actually really like the "shimmer" effect of the weapon trail. Lends a important sense of speed and power to the swipe. I don't know how much of a badass this enemy is meant to be, but if like in most dungeons the skeleton is kinda standard, then maybe it's an effect best kept for a boss or large enemy? Its a really cool effect but if every skeleton and giant spider or whatnot has it, it kind of loses its impressiveness :p In any case, good job on the art, I wanna play this already!