The Linux download is wrong - it's just the binary.
One of our devs was able to play the linux build, I think. If you don't mind, could you share what exactly is wrong? Is there an error message?
The file provided is only the .x86_64 binary file, without the associated .pck file. The error when running is something like “Couldn’t load project data at path “.”. Is the .pck file missing?”
Usually itch.io linux downloads provide a zip with the .x86_64 and .pck files together, game engines typically spit out both I think.