FFS, please change the landing page to indicate that it is Windows-only.
This landing page does a perfectly good job at communicating what it needs to.
I can see clearly too, that it is for windows by the pictures, but better to say it with words.
But there are some empty files for other operating systems in the source:
https://github.com/wojfil/perun2/tree/master/src/os
So support for other systems might be planned.
The landing page is fine.