What's your level actually? I tried two games myself: "My Japanese coach" and "Tadashii Kanji Kakitori-kun".
The first one is for English speakers with little or no knowledge of Japanese. It was way below my level so I didn't play it for long and can't give a good comment. The other one is made for Japanese elementary school kids to learn Kanji. The game assumes fluency in Hiragana and Katakana and at least conversation level Japanese. That's perfect for me so I played it a lot. I can really reccomend it. It lets you draw Kanji on the touch screen and takes your accuracy and stroke order into account. It also has a mode where you have to fill in the Kanji in a sentence.
I hope this helps.
