ExpiredKeyMapError on geoguessr-clone.github.io

[nickgal]

Getting the following error when trying to play via geoguessr-clone.github.io

Google Maps JavaScript API error: ExpiredKeyMapError
https://developers.google.com/maps/documentation/javascript/error-messages#expired-key-map-error

[anonymouspenguin000]

The game prod is temporary closed because the API reached the req/mo limit. You can try to run the app with your own key, all the instructions are in README