Hi Andrew, great seeing you here. I'd love to chat with you because I also plan to create some more games around Fermi estimation in the future. I would, if you don't mind, send you an email to the address you've listed in your profile.

Please do! This is a fun area that I think has some potential.

A HN moderator actually directed me to this post. I never would have seen it otherwise, so I'm grateful for that.