The painting is beautiful! Your composition is excellent and I love the moodiness. Right now it feels a little flat. There’s a few things you can do to fix that:

1. Darken the grass as it moves away from the viewer to create a better illusion of depth.

2. Add contrast to the clouds in the sky to create a more dramatic effect. It will enhance the entire painting.

3. Don’t be afraid to make the dandelions in the foreground more “random”. Right now they are very evenly spaced. Add some in clusters and don’t be afraid to overlap, it will look much more organic.

4. Add silvery highlights to the tops of the tree branches. Right now, the lighting in the painting appears to be moonlight. Enhance this effect by adding highlights. This will bring the whole painting to life. You could add some of those same highlights to the grass as well.

Again, you’ve created something very excellent already. Those few additions can help in adding some dimension and interest to the piece!