Hmm, can't seem to find a way to check the version. I downloaded it today though, so likely the latest build, just using the itch.io linux option. Extracted the files to a folder. Doubleclicking the Pumpkins_ClientSupporter.x86_64 just worked right away which surprised me, no need to install, so maybe I missed a step. Game works 100% otherwise, just no network connected.
On Opensuse Tumbleweed.