I quite like it! Especially the riverbanks are well done. I'm not too sure about the trees, though. They look a bit lopsided. And you could add some, especially towards the background.
You might reduce the reflectivity of the water (or perhaps it's because the sun is relatively strong here), increase the translucency and add a few stones in the riverbed.
Just a few ideas, not more. So far it looks good (in my humble eyes...)