I think you should take that skull out. Its taking way too much attention from everything else. Not to mention it doesnt look as good as everything else.
Great work! As everyone else has mentioned, the skull definitely needs to go away. It's not as polished as your other objects and doesn't do the tower justice when its taking a huge chunk of your shot. As for the tower itself, I'm a bit bothered with the round pipes/windows on the top floor. Those don't look like the sort…