This looks really neat, I like the slightly abstract look in it. I don't do paints, but this kind of makes me want to try some painting projects. If I had to say where it could be improved I would say to add a bit more detail in the water to give it a flowing effect and make some grass stand out a bit. From the name I take it that this was done very quickly so that's why I have rated it the way I have. Good job over-all and I hope to see more like this, it's really neat.
Once again, you've demonstrated that you have real skill in taking a color theme, and extracting so many variations on it to create mood and setting. A very nice piece of work. I like the hazy feel as the image trails off, deeper into the marshes. I also found it interesting that, even though the wooded swamp is thick, and blocks out most of the sun, you still found ways to suggest that filtered sunlight is giving muted highlights to the patches of grass and mossy stones. And the short, horizontal brush strokes create a nice impression of naturally occurring stacks of plate-like stones.