I absolutely love this strategy, even if it's probably not optimal, because it's just so dumb that it even works. This one happened to break, but many other working solutions didn't, and the car would get slowed down long enough by becoming squeezed between the long road and the cylinder. A more optimal design, suggested by Arglin, is probably to cannon into the top star, then swing it a full 360, and let go. Good luck to anyone who wants to find that!