I really like this image. I like the green moss on the rocks. However, there are two things bugging me about this. I'm not fond of the purple, muddy color tone of the sunlight in the background and more importantly: The way the water flows, it feels like your camera is not completely level. I am sure, you leveled the camera, becaus all of the trees are upright, however, the lay of the land in the foreground feels kind of tilted. Maybe if you transform/warp the stream a little, this would be a 4 star image for me.

Again: I really like it, just trying to maybe give tips to do it even better!