Betcha everyone's screaming about the horizon line... Ok, so even if you had straightened it, they'd all be bitching about it being in the center. Can't win. Nevermind, this is my second looksee and I'm bumping up. Great exposure and colour. I also like the subtle symmetry given by the reflection on the water. Good luck in the challenge!
I would like to offer a bit of constructive criticism of a couple of things that would improve this photograph. The first and most obvious is to level the picture across the water line. The second also involves the water line being in the center of the picture. If you changed the crop to the top of the hill on the right you will still see your beautiful blue skies and all the water, but it would move that water line off the center. It's a nice picture. I hope this helps.
Oh, dear. Lots of people are going to tell you about your lake horizon, I'm afraid. Sometimes, even if it is an optical illusion, it's best to make it straight if possible :)
Still, it's a beautiful image and you must have had a fine time enjoying it while you were there.
The potential for an interesting shot is here, the stuff of interest is too little of the vertical extent. It might have worked better to crop so the mountains and reflection take up more space. You'll also get more zing by moving the shoreline out of the center of the picture. You can still get the mountains and the reflection in the shot without that.
And, as I'm sure you'll hear repeatedly, the horizon is tilted.