Cannot install the game on Linux. Seems that the installer cannot find any files.
As going to the itch game page with firefox works. Which confirm that is an itch installer issue.
My system is up to date:
Having the same issue, seems that the itch app can't handle plain executables, butler gives a warning about "No mapping for file extension ()"
Also found out that the Linux executable is actually an installer, which complicates things futher. It would be 10x easier to just put the Linux versions contents into a zip file and upload that just like it's done on the Windows version.