I love the color scheme and the background story. The details to the different textures with the metal and the hair and that blue light being so vibrant. Overall this is a really cool piece and my only very very small issue is with the girl near the bottom of the artwork. My issue with her is that one of her arms are hard to see, which might be something you did on purpose to show the blurred quick movement of the piece, but it's still a really good piece and I commend your skills :)