Advanced critique? What? You're not in need for that here, hon. This is great! But, if I HAAAAAD to say something, I think I'd tell you to go shade his..tool. Or whatever. The funny stick with a knife on
This is a lovely image. I'm not sure what I would change on it if anything -- I think the flow, balance and colors are all very well done. At most, I might recommend putting some plantlife in the background or whatnot, but I don't think the image is lacking without it.