I like the subject and the coposition, my only critique is that the leaf looks a little bit overexposed. The problem there, however, is that you may risk losing detail in the water if the leaf were darker....so, it is a tough call.
Thanks! The colours were admittedly changed by the scanning process. In my original pic the leaf had more definition and the water wasn't quite as dark, but my scanner isn't top of the line, nor is the software.