I'm using the Itch.io app for linux. In it, I just clicked the general install button on the bottom left, which will download a few files to your path. Then run the game from the in-store play button, click the file in the middle titled RERUN_linux.x86_64. That should work.
(Also, I'm on Pop_OS which is a derivitive of Ubuntu 20 ~> so I don't know if it'll work for anything that isn't Debian based)