Don't have build support installed and it's 3am here so might be a ttomorrow job. Edit: Done!
The linux build doesn't seem to work very well for some reason. It could just be my setup, as I am using nixos, but I'm unable to walljump, or access the options menu.
Very weird, I'll try and fix that in the next couple days, thanks for your patience!
Fellow nixos user here!
It works fine for me using steam-run if you don't mind unfree (according to SO nix-ld should also work but I haven't tried it yet)