Ok, I’ve looked at the source provided and don’t see an e-mail field either. The account e-mail is also limited to your own instance, correct? This thread was making me mildly concerned that e-mails were being shared when federating between instances.
I wasn’t expecting to find a new “polished” open source game I’ve never heard of from this thread, but somehow I’ve never heard of Thrive before. It’s even got a steam release!