Really like the idea. I was excited to scoop this up on day 1. Knowing a few hundred kanji already, the menu can be navigated pretty easily but even going into 'normal mode', the lowest one offered - it starts you right off the bat with multi-character onyomi readings. I picked the jojo's one to look at after toying around in main mode for a while and most of the questions just ended up being character names...which isn't very practical, if my understanding of how widely different name readings can be compared to basic vocabulary, is on point.

Definitely not for beginners, but I can imagine this would be super super fun if you were more of like an N3+ level learner. I do appreciate how it spells out in kana what it is you missed, and you can certainly glean quite a bit by going after each lost round to look up the meanings of answers. o7

Edit: Oh, can't believe I forgot one issue I had! If you do not have a working Japanese digital keyboard, it will not accept your answers. Gotta make sure that you're typing using kana, the game won't convert romanji characters like many learning sofwares. That might be more obvious to people who've played stuff like this before, but someone new coming in might not forsee that hurdle right upon downloading it!