Great photo but I can't figure out what you are trying to say. Maybe it's just a bit early in the day.. After some cafen maybe the second pass will make a bit more sense.
Something about the pointy toes on those shoes reminds me of the wicked witch of the East(?)'s shoes; I'd be better able to focus on the intended meaning of your photo if not for this odd association.
The rose petals and the position of the feet are nicely done, but the lighting could stand some improvement. The fold in the background makes it clear that this is a white bed sheet, and the white is overexposed around the rose petals. Playing with the curves would probably have allowed you to make the entire background white without blowing out the detail around the petals. I take it that the sheet forms a rounded corner as it transitions from vertical to horizontal; this does a nice job of hiding the seam and creates a more studio-like feel. The image seems to have been slightly oversharpened; if the background weren't such a bright white I doubt that the effect would be noticeable. The white background also makes your model's skin tone look a little uneven; in front of a more organic looking background this probably wouldn't be noticeable. I think that a little bit more breathing room behind the raised heel would make this image look a little more balanced.
The shadown and the wrap of the background is a little bit distracting, and I suggest using some foundation in order to make her veins less visible on the feet. I like the composition and the colours, blacks, whites and reds work very well for this subject.
Nicely setup. Good perspective and generally a good shot. If possible, for next time consider positioning your model further from the backdrop screen and shooting at a wide f/stop (low number) for a narrower DOF to prevent the backdrop screens wrinkles from showing up.
I really like this pic. I wish it was an advanced editing challenge though so you could edit out the creases in the sheet. Great idea though and that little factor won't affect my judging. I know you were limited by the rules. 8