A couple things
First, I'm sorry to start negative but the random ad in the middle of this game? Not good.
That is the only thing I thought was questionable here. I really liked the American flag one, it worked the best for me as well. Great concept, and you definitely have done a lot of research on the subject. Interesting use of the menu however. Can you make the menu return you to the page you were on when you finish the first test on the second page? Like if you end the minigame, it sends you back to page one on the menu instead of where you were... Also some may be frustrated at the ad they have to watch twice just to see both games on the second page, changing the load order may reduce that.
Obviously, 10/10. 5 because there was palpable author interest on the subject and it stayed on the same track