I wish I had something like this years ago, my kids who have had no desire to learn Kanji have really taken a liking to this game and ask me everyday if they can play it. I get a kick out of watching them learn kanji. Its a lot of fun and really keeps their interest. It starts with two green attack "spell balls" which are loaded with different kanji with a one word definition in English and progresses to four later in the game. There are also different color attacks, for instance two red spell balls combine to spell a new word, two purple spell balls combine two kanji into a compound kanji word, and there are orange spell balls to do a four ball attack with the four seasons and others. With each attack you also must defend, different enemies battle you with new kanjis as you travel the map which you can add to your attacks as you learn them.
Its a great game, please add more levels!!
dinutah about Ninja Words Adventure