Thank you for putting in so much effort! This really helped us a lot!
I did some research and there seems to be a bug with browser exports of Godot games for Mac. I assume this could be the issue since you mentioned having it for other games as well.
But I have good news: I’ve just added a native Mac version. We tested it on a friend’s Mac (M1). If you still would like to play, you just need to download it and right-click “open” :)