For what it's worth to those who might want to try this, you likely won't be able to run the game just by downloading it and opening the index.html file in a web browser. However, if you use python to start a web service at the download location and you point it to your local host, you can run it. I was able to do this on my Linux install (so for Windows, YMMV) by running the command 'python3 -m http.server 8000' at my install location. Then I opened up my browser and went to localhost:8000 and the game loaded. I do the same thing to test my web builds of my Godot web exports.