User blog comment:Akrie/June 11th Events & Updates~!/@comment-25889587-20150612100310/@comment-25968376-20150612163755

Well that game was probably aimed for drilling those who already know some of them, not meant for learning everything at once. If you're a complete beginner, download an Anki deck and practice 10 or so per day, and you can finish all of the kana in like 2 weeks.

Btw, it's A-I-U-E-O