License
- Icons made by Feathericons are licensed by MIT License.
- Icons made by Eucalyp are licensed by Creative Commons BY 3.0.
- Riichi-mahjong-tiles made by FluffyStuff are licensed under the CC0 1.0 Universal
License.
- Background music Highland_Mist
made by Wildfire Games is licensed under the Creative Commons Attribution-Share Alike 3.0.
- Sound materials Dizi, Suona are licensed by Creative Commons 0 Licence.