Hmm, I just checked it on Windows - it was working fine.
You can use an alternative link for downloading: https://github.com/silencefound/Kinksweeper/releases
(or direct for windows: https://github.com/silencefound/Kinksweeper/releases/download/v1.1.0/Kinksweeper...)
Regarding mobile app: unfortunately, I'm not a mobile developer and cannot commit resources and time right now to learning it. But given that framework used (AvaloniaUI) is cross-platform and support mobile development, if anyone want to create a port, I would be glad to help.