Hey Alterion, unfortunately I'm not a Linux user and I haven't been able to test that as much as the Windows and macOS versions just yet. I remember this coming up during the kickstarter campaign and other users had comments about it (including running the 32 bit version with extra dependencies).
I think the demo contains a 32-bit binary for Linux in the download but let me know if I've left it out.
This comment might have some useful information, otherwise try running it through the itch.io launcher (or without it, vice versa) instead of downloading it directly. If you're still having trouble let me know and I'll poke my much more knowledgable Linux friends for help. Unfortunately given the wide variety of distros out there it's hard to know what the problem is without more information, but this (hopefully!) shouldn't be an issue by release.