The first thing a person notices in a painting is usually the most important thing to take into consideration, because while the artist is dealing with specifics, the picture in a broad perspective may be off, and the first things I noticed were the extremely warm and muted tones used (and beautifully used, at that), and how you gave attention to the things right up front by using thicker amounts of paint and doing less blending.
Overall, the painting is very well-balanced and interesting to look at; something that catches your eye. I only see a few small things because I'm actually searching for something I can critique you on. I personally would have blended the top edges of the background trees and the sky so that the viewer could really focus more of their attention on your two tree spots.
I also, now that I'm searching, don't really get why there's a hint of a green reflection on the water next to the left-hand trees when there's not huge tree on the other shore for it to belong to.
Lastly, just as a general thing, I'm a little confused on why you blended the edges of the foreground with the water so much, but then gave hill on the opposite shore such sharp edges (that kind of goes with my first point). Maybe it's that you want to direct most of the attention towards the top of the painting?
I think this painting is great. I love the tone, the mood, the setting, and just the color combinations you used, especially for the water, which I really like. Great job.
I enjoy the over all warmth of the piece, it feels like a soothing early evening. The texture on the leaves on the front trees is really great. I think for the trees in the background it would've been nice to see a bit of that texture and a little more variation in color. Which is something really minor and I don't believe it takes away from the over all piece which I think looks great!