Wow! This is so cool. Everything about this picture invokes the perfect image of Halloween. I love the amusement park concept! The fog and smoke drifting down from above is a nice touch -- same with the way some of the buildings seem to be carved out of trees, almost as if everything sprouted up from the ground.
This is absolutely incredible! I see you did a very interesting amount of detail. I love the colours and expression the witch has. And the rides kind of give it that cute adorable, yet spooky vibe. Very lovely.