BUMPERHEIR: What You Hit Becomes the Ball Remix

BUMPERHEIR is an original ball–bumper role-exchange pinball puzzle. Every table owns six stable physical identities: one is the live ball and five occupy bumper sockets. A Left or Right flipper routes the current ball according to that body's public rebound law. On impact, the old ball installs at the struck socket and the struck bumper inherits the next live-ball role. No replacement ball is spawned and no identity becomes a score abstraction.