I really like the idea, and it is quite fun! A few times though it felt like the game was a bit bugged. I had the flag of Belgium come up, and the correct answer sounded to me like "Guten Morgen" from German. However, only a small part of Belgium actually speaks German.
Also, maybe I'm stupid but what exactly was I supposed to do here?
Also, big props to you for actually speaking the words yourself! Sure, it's not studio quality, but it added a nice little personal touch.