Just came across this neat game today, glad to hear there will be the PC version on itch.io as well and not just steam. Will there be a Linux release of the PC version at some point once that is published?
Viewing post in Slipways PC - release date, trailer, Steam page! comments
I know people have been playing the Steam demo under Linux via their Proton compatibility layer without any issues, so that's a good way to play if you're on Linux - but I understand if you dislike Steam.
A dedicated Linux port is unfortunately not something I can afford to do at release, but might be something to consider later down the road.