www.memrise.com is a website im finding extremly useful, its also avaible as a free app for IOS and Android, theres a number of courses people have created from building your vocab to kanji with both on and kun readings
A Profile : http://vndb.org/v1894
The game that taught me to check the spoiler tags on VNDB, i made the mistake of thinking it would be as awesome as other Akabei soft titles, Miou's route felt forced and boring