Nice painting. Only thing that I see is it feels like everything is running down the right side. there are 7 lines all running off the same direction which gives the feeling that the painting is not straight. The trees are also slanting to the right. If this is a lake Often times you will see a section of the water that is blown by the wind and shows white but the rest can be still. I think if you break up some of the lines and straighten some so they are not all going in the same direction it would give more balance to the painting. Also maybe darkening the water. I am not a pro. Just my thoughts, but I do like the painting.

Also..
Make a value change on the left side trees to separate them for distance & interest….Being the same color blends them all together..

With the water, in my very limited experienced opinion, I might suggest having some smaller details near the back shoreline getting a bit larger as your are moving towards the foreground/water line to give more depth and distance to the lake overall. I really like it!

What I do us patch in the colors and shape. Then with a wide brush drag it down from the horizon line. But then it looks like there is a current with some possible wind waves so the reflections if any would be quite distorted. Good job leveling it. Looks much better. You have a nice thing going there.

I think i’d add an inlet or sandbar to the right side of the painting and make the shoreline a little less straight. Maybe add some rocks. Love the mountains!!!

I think the sky and mountains are looking really good except for the shoreline. I find the little row of trees distracting from the majesty of the mountain.
For the midground on the left, I liked it better when it was all pine trees. The tree you have there now doesn’t fit in and is too detailed. You should simplify this area and just think “shapes” not “things”. Also, you don’t want to draw the eye to the edge of your painting with that very tall tree. Cut it down a bit, but don’t have it level with the mountain.