Back to comment: Nice colors but the image looks a bit out of focus. You may want to sharpen more after down sizing an image for a challenge. Most people use Unsharp Mask to bring back the sharpness lost because of down sizing. I also find the subject matter to hold little interest for me. A tree centered in an image shows little creativity.
Nice colors. The leaves seem to be framing the tree, which would be nice if the tree were more interesting to look at. Also, it looks like the leaves are blurred a bit. Perhaps a faster shutter speed might have helped with that.