Hmm, I really do enjoy this picture. It is so very simple, but very interesting at the same time. I would have loved to see you take it from an angle more obscure, like at a side angle or from the other side, so you are looking at it forwards. Or have you play around with the color, if it was still in color but had more of a black tint to it. it's still a very nice image. Also makes you wonder how that little leaf got nudged so much under those rocks. It must have been a pretty sight to look at.
Vision: I really, really, really like it. The red has such a beautiful contrast with the gray rocks, breaks it all.
Originality: is near it's high point, colorful items between rocks are generally a type of photo that everyone has to have in their own version
Technique: really a thing to love. Nice and sharp, with the focus on the right spot. And I truly like the fact that you didn't make the rocks black and white and then left the leaf red as "selective coloring". Thumbs up here!
Impact: generally gives out the feeling of a neutral emotion photo, although with a taste of loneliness, yet strength. Definitely worth a view, fave and a comment, beautiful photo.