I really like this its simple yet beautiful, im new to this so I dont really understand what people are saying until ive read there comments and gone back and looked again at the image. So hear goes
I really like the gradient in the water it adds a bit of mood to the image also the white halo seems unnatural and bleeds a little on to the leaf as for the difference in colors youve captured them stunningly. The only thing I would do would be to try tone down the halo a little.
Just a newbies thoughts
Mark