Kirchhoff Arcade by Rafael João Ribeiro (IFPR).
Upstream revision 1faf0dc773a024892a4b8f8b5ea58e52097a3577.
Code: MIT (LICENSE.txt). Original visuals: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ .
Leaf changes, 15 October 2026: local build, font fallback and smaller minimum board for embedded phones; namespaced browser storage and lifecycle bridge (MPL-2.0); all original recorded audio omitted, replaced with original generated tones and a silent music track (CC0). No original puzzle or circuit rules changed.
Complete adapted source and build instructions: source/.