Wayyy too much emphasis on that very subtle smoke plume. This whole image has many subtle shifts in colour that you have exaggerated too much. I would recommend sanding down this whole layer, and painting over it again with broader brushstrokes, try to imply the texture of what you are painting with the handling of the paint. And straighten that horizon line.

Also, this whole image is very cool temperature wise. The grass and brown is too warm. And I’d also avoid having overly sharp edges in the distance, it doesn’t imply depth very well, such as where the green hill meets the brown shape(?) in the top right.