I really like how the flower is placed in the middle! the leafs are gorgeous too, but the only thing i do not like about this picture is that it is darker on the left side, good job though!!!
The lighting on the leaves, in my humble opinion, is fine. Where this upload could be improved, I think, is by getting closer to the subject of your macro so that the lens will focus on the flower. I've found when taking pictures of light objects it's good to try to get the focus set on the light object and not the darker ones....that way the whites won't be overexposed :)PJ