I think I'm done with the game.

The difficulty level is too basic for me.
I looked up youtube for future contents and it's a quite lengthy game (20+ hrs) and I don't think it's completed yet.
I think it's an excellent game for newbies who want to start learning Japanese.
If you're serious about learning Japanese, I'd recommend downloading "Kanji Study" app. It's paid (1 time purchase) now, but it's well worth it with so much kanji and example sentences for contextual usages.