Pingus 0.7.6 — Ingo Ruhnke and the original contributors (AUTHORS).
Original GPLv3-or-later game, complete original data, 383 .pingus level files, 11 native levelset definitions plus Tutorial Island, world maps, level editor, artwork, sounds and 20 original IT/S3M songs. GPL terms are in COPYING; file-level notices and compatible GPLv2+, Expat and Zlib notices are in ASSET-LICENSES.txt. Original resource bytes are unchanged and individually hashed in ASSET-LEDGER.json. The music README mentions optional Kev Bailey Ogg contributions; those tracks are absent from this stable archive and are not in this distribution.
The original IT/S3M files are both runtime and editable tracker music source. libmodplug decodes their original notes/samples to stereo 44.1 kHz PCM for Web Audio, retaining native track selection, looping and volume. Original WAV sound effects use SDL's browser mixer. libmodplug's original public-domain notice is in MODPLUG-LICENSE.txt and its complete source is included.
Browser adaptation by Leaf Arcade, 2026, GPLv3 or later: original supported software SDL renderer; explicit C++ portability fixes; SDL color-key, alpha metadata, proper source/destination clipping and key naming; a cooperative browser yield after slow frames; first native menu frame readiness; bounded per-game browser saves, native Quit, fitted canvas and frozen clock/audio pause. Read-only observation functions verify genuine play; they do not change the simulation. No levels, action budgets, win conditions or physics are changed.
Boost 1.48.0, Boost Software License 1.0 (BOOST-LICENSE.txt). libpng and zlib notices are in LIBPNG-LICENSE.txt and ZLIB-LICENSE.txt. Emscripten 4.0.23 notices are in THIRD-PARTY.txt. fflate MIT terms and all corresponding browser/library source are included in source/.
Complete original source, supplemental upstream editable art, the browser preparation/build scripts, adapters and exact native dependencies are available in source/. Native cache images and exported screenshots are temporary; progress, settings, authored levels and recorded demos stay in this browser within bounded local storage. Unfinished attempts restart after Stop. No account, server or recurring inference service is required.