You know looking at this I felt like I stepped into the swamp in the Princess and the Frog. It definitely has that spooky and magical quality about it, not to mention green is my favorite color. Wonderful job creating the dim beam of light coming through the canopy and adding in that bridge to suggest there is life nearby. I think the only downside to this is how opaque the water is. It looks like solid ground covered in grass. The saturation would need toning down and if you did this digitally you could add in a water ripple texture. Although I'm pretty sure swamp waters are glassy and smooth. I don't remember exactly.