Hello. Is this from the itch.io link or the google drive link I commented lower? I don't use windows computers so I can't really test if the windows version works.
I'm not really sure what to do then. I checked the folder and it has UnityPlayer.dll in it. I also built the game once more and the files seem to be identical in both folders.
I've just built a WebGL version and uploaded it as a separate project. Hopefully, that will work:
