Unofficial browser build of the original open-source game. Copyright Ingo Ruhnke and contributors. Original engine and content under GNU GPL v3 or later, except separately credited dependencies.
Original campaign, editor, level sets, graphics, music and effects. Bitmap font atlases are replaced with Caveat (Caveat Project Authors) and Noto Sans CJK (Adobe/Noto Project Authors), both SIL Open Font License 1.1: Caveat notice, Noto notice. Atlas generation scripts and source fonts are included. This change preserves original text layout metrics.
Completed-level progress and settings use Mindblown saves. Unfinished levels restart. Touch controls emulate original mouse actions; desktop or landscape is recommended for the larger maps and editor. No network multiplayer.
Browser changes: Emscripten SDL2/software rendering, compatible build dependencies, touch input, native-file saving with revision checks, sound and session integration. Complete corresponding source, licenses and build instructions. Official upstream.
SDL2/SDL_image (zlib), libpng (libpng license), JPEG (IJG), zlib (zlib), Emscripten (MIT/UIUC), GLM (MIT/Happy Bunny), libmodplug (public-domain notice), and helper libraries retain their notices in source archives. No warranty; no affiliation or endorsement is claimed.