Neat concept, it reminds me of The Textorcist, a game where you type and avoid bullets at the same time. The whole gameplay loop is similar to that and I 'd say it's quite fun and challenging too. For some criticism I think the difficulty should increase over time, such as more difficult questions and enemies for the player to deal with. Ah btw I do encounter one impossible question that is 0/0 and that just literally ended my run :(
Anyway, keep up the good work!