Touhou Trivia is a very cute concept, and making two non-Touhou charactes do it while keeping to the tenants of the Touhou universe is an especially bold move. I feel like it adds wonderfully to the universe in its own strange way, especially if you get to the true ending. I found myself wanting to know more about both the characters by the end of it, so it's a shame it has to end when it does. The options to flirt with the youkai are fun as well. The visuals are great and have a sense of ownership to them, for sure, and the music is good too. The programming, like Luyuu points out, leaves something to be desired (my cllcking multiple times to get out of stuck or repeating dialog resulted in my getting a question wrong, for instance.) But this is a very solid effort, and I look forward to seeing more of your work!