Really stylish and striking character. The environment on the other hand is kind of flat and uninteresting, namely the dither into black on the grass. In addition to being flat, some things on the foreground just don't read, namely the water and, is it a log?
Trying to address the ground problem:

I also bulked up the bush towards the middle. If anything, the color should recede towards the edges, not the center. A symmetrical bush might be more aesthetic I think the edge of the grass could look really nice if you made uniform spikes going down into the dirt, as your style is rather geometrically pleasing, using straight edges and lots of rectangles. If you keep the background light, you can keep saturation, which I think is important.
Be careful about diversity, all the different plants next to each other throw away a lot of unity. I think that's what this needs most, unity in style and repetition of elements.