This is a test assignment I completed in about 10hrs. Didn't need to be rendered. Wish I had more time to put more details but you know how them assignment goes... never enough time to do everything you want. So, here it goes, wish me luck.
While the wings and flower are very simplistic, you've still given them the attention to detail that they require. The shading on the pants is phenomenal, as well as the faint lines on the stomach and the outstretched glove. I think that you could have paid a bit more attention to the details that would be present in the face and the hair, but overall a very well done job for the time constraints you were under. If you were looking to challenge yourself a bit, and you had the time, I would suggest trying to color in the image (in a separate file in case you don't like how the coloring turns out!) and really focus on those little details you missed here as well as paying attention to shading the colors.