I used a picture of the original as reference, but I did not outrightly trace it. At the time, the original picture I had was very small and muddy so a lot of the background details I had to wing when painting.
You did a good job with Zero's sword and all of the poses, and most of the colors in general. Some of it seems a little flat in places, not enough shading. Looks kinda like craypas too, instead of acrylic paint.