The reply to that Tweet has this Tweet with the downloads:

For another ~2 weeks the app will be in open beta. You can download at any of these links:

iOS - [...] Android (Google Play) - [...] Android (web) - [...] Android APK -[...]

But then a later Tweet said the Android build had an issue so only the iOS version is usable at this time:

Some issue with the Android build; oops! Will debug in the morning 👌

https://nitter.it/ArcadeCityHall/status/1560474972509937666 <-- Shows the thread in a single, easy-to-read, web page