Composition: I think the subject of your photo is very compelling, but the framing of it is the weakest part of the photo. Keeping the trunk of the tree off-centered is a great choice, but perhaps an additional off centered line would help (the "eye" is pretty much centered).
Background: The muted and dark greenery is a great background for this piece.
Camera Work: (Focus/DOF/Exposure) The DOF with the mushed leaves is wonderful. The colors and exposure are good, but I think the textures of the eye would be served by a crisper focus.
Post Processing: the in camera exposure is good, there was no need to do any other post except for maybe a more creative crop and better use of positive/negative space.
The Challenge: n/a
My Opinion: I like the colors and textures you found here. I like the subject much better than the execution, but luckily that can be easily remedied, you have a good eye for color and the use of DOF was great. Cropping the top more radically actually gives it more of an "eye" feel because it allows us to imagine an eyebrow.
I hope these comments have been of help to you. Please mark them as helpful if they have, and feel free to PM me if you want to discuss or clarify anything here.
I really like the eye, but the photo is lacking sharpness and clarity. I would try to refocus the photo and shoot it a few more times. You'll get it. Try just before / at sunset too. You may get some of that yellow lighting back into the photo and less bright white.
Spooky! I've heard of 'the hills are alive' but maybe the trees are as well!
Nice capture detail and nice find the only thing I find a bit distracting is the light seems a bit on the bright side at the top
Very original 7