Interesting concept, though functionality seems a bit sticky re: the lever to drop the body. Clicking it on the same position doesn't immediately do anything, and I have to click a few times just to get it to function once (either to open or close, as in, I click twice to close the bridge when it's open). If this is from needing to inhibit input during the animation, I'd suggest doing away with the need for a second click and having the bridge replace itself automatically.