This game needs a local server. In this folder run python3 -m http.server 8000 --bind 127.0.0.1 (Windows: py -m http.server 8000 --bind 127.0.0.1, or python instead of py) then open http://localhost:8000
python3 -m http.server 8000 --bind 127.0.0.1
py -m http.server 8000 --bind 127.0.0.1
python
py