Launching a geography quiz website

I have scheduled the launch for tomorrow for my new geography quiz site. The goal is to help people learn geography while having fun. The site currently has 100+ quizzes covering flags, capitals, city names, and country shapes, down to individual country and even state/province level.

Our actual tag line im thinking of going with is - Built to turn capitals-and-flags enthusiasts into worldwide, world-class, world-map aristocrats. Graduation title: Mercator-Class Cartography Scholar, PhD*

*PhD: Probably Heard of Düsseldorf

I have spent a lot of time testing the quizzes to make sure they work correctly and would love any feedback whether positive or negative to improve the site. Right now the launch is scheduled for tomorrow but i may push it back based on comments. Please have a go yourself: https://geographyquiz.io and let me know what you think!