After I read the micro article and scroll down a bit to click on an answer in the quiz, then click on the answer, there should appear one more button on the bottom right [Done] or [Complete] or [Continue] to give me a final confirmation and satisfaction that it's done. Right now, after I choose the answer, the answer is highlighted, great, and ... nothing - I have to scroll all the way up and use the back button (top left arrow), which kind of gives of the feeling like I accomplished nothing and need to retrace my steps back.

Agreed. I'm currently working on these minor issues. Thanks for raising this. Much appreciated.