I like the toning - though I think it's more creepy than spooky if that makes sense. But what you should have shot is the dog tied to the tree. :-) (Your notes made me laugh!)
Branches are quite burnt out and have lost their detail. Having said that, at the top of the image this works well against the very dark branches against the neutrally toned sky. However, towards the bottom of the image,the sky is lighter and there are less dark branches and so looks a bit washed out. Perhaps if the gradient of the sky was reversed, light to dark, top to bottom respectively, then I think this would have worked better