Pretty subject. The lily isn't quite in focus--seems that you focused on the closest petal rather than the center of the flower. Softer lighting would work better also.
Definitely meets the challenge and exhibits proper bokeh. The subject matter leaves me wanting (not because it's a flower - I have nothing against flowers - it just lacks a "wow" factor for me). A little smaller aperture would have put more of the flower in focus as well. It looks like you shot with 2.8 or 3.5, thus only capturing the front peddle of the flower - focusing in the center of the flower at those apertures (as opposed to the front peddle), would have produced a better image (IMO). Good luck!