Okay so I don't know if anyone else is experiencing this issue but theres something with the zip encoding/creation of the win version of the beta that's wreaking havoc. I have no doubt that it extracts properly on windows, but when I try to extract the windows version on either Mac or linux it does NOT restore the files to the correct folder paths but rather it renames them to that path...like jre/engine/filename... this makes it unusable even with proton. I have tried multiple utilities on linux with multiple options (keep path, ignore path, detect subfolders, etc) with the same results.
The prior version extracted and runs fine on steam deck, and I've played it quite a bit. I think this one will too if I can get it to extract properly. I hope that this is something that can be resolved on the developers side. Love this game!