Swipe/arrows/WASD. Save once, noting the saved peak and arrival cell. Recall exactly restores board/score. Carry Recall instead selects a future tile greater than that peak, at most32, and places it in the first saved empty cell. Both consume the same one return. Cancel backs out; R restarts.

Original compact interpretation; scenario rules and goals differ from the inspiration. No copied assets. See source notes and complete QA replay sequences.