*Critique Club*
The only real downfall I see here is what has already been mentioned, and that is the out of focus piece of bark that is closest to the camera. It is right in the center, and creates a bit of a distraction as it is so noticable and right in the center.
I think that the angle and framing/cropping are perfect for the challenge. Fits just fine. I like the closeness and the textures and detail are really good.
The lighting seems to be ok and I see no horrible bright spots or distracting shadows.
Focus on the bark is good, with the exception of the closest pieces. I think a larger DOF would have worked better here to possibly have the closer pieces in focus. This wouldn't be such a distraction then.
Overall, a nice shot, good detail.
~Heather~
Unfortunate that branch or other thing in the center is so out of focus. I think as a choice of subjects, for this kind of challenge one with the least amount of depth is the most prudent choice. Good Luck!