Libre Duck Marines by Tangram Games and IntinteDAO. Game code zlib; original graphics CC-BY-SA-4.0. Replacement music by Colin Beard, Victor Seven, Johan Brodd and Cynicmusic under CC-BY-3.0, CC-BY-SA-3.0 and CC0: original LICENSE.md retained in source/. No original noncommercial music is bundled. slam/Tserial retain their component notices.
LÖVE.js 11.4.1 compatibility build by Davidobot/Tanner Rogalsky, MIT. LÖVE engine and dependency terms remain in corresponding engine source. Leaf lifecycle and persistence adapter GPL-3.0-or-later. Gameplay unchanged.