Any chance you can provide Steam keys? Using Proton is fine but Steam is the best UI for running games under Proton.
That’s sadly not possible due to me offering Community Copies – it would conflict with Steam TOS to offer free keys on another site, but I want to keep them for folks who might not be able to afford the game right now. If you’re on Steam, you can add the itch-version as a non-Steam game and launch it through Steam anyways!