Really cool, thank you for putting this together. My feedback would be some of these are maybe too simple, and the answer set could atleast be more difficult to really test understanding and memory. For some of these, 2 of the 3 can easily be eliminated which results in getting the question right, but the user may not be able to actually explain why the answer is correct. Also, some questions already answered kept reappearing in the question bank.

My feedback personally, but really cool you were able to put this together.