http://www.coolest.com/penpen/
With this downloadable application, the user controls a penguin pushing a block of Kanji/Kana towards Kana readings and then onwards to the English reading. There is only one right answer. Simple really.
The control system uses cursor keys and is easy to use. The user may test their skills by choosing between either Hiragana or Katakana and different levels of Kanji. The testing framework can switch at any moment with a diverse range of symbols to stretch the user.
Despite the use of grades the application aims for a user who can already read the symbols. A fun way to improve character recognition while trying to achieve that perfect score.
Genkinahito 
Seems like a fun app, but a bit easy I suppose 🙂
I agree, however it’s aesthetically pleasing and who doesn’t like Penguins? 🙂