This game is meant for children. However, the average 「外人さん」 can also take advantage of this game to learn 1006 basic kanji.

The clear advantages of this game (and for the most part its previous version) over traditional self study –at least in my own case– are,
1. Helps defeat procrastination, as you only need to turn on your console and commit 5 minutes to find out if today it feels like it's even worth the effort.
2. Instant feedback and gamification: knowing straight away if your attempt at writing a character is legible turns that defeated procrastination into willpower, as you only really need to focus on writing using the right stroke order and character proportions. To this end there are 3 tools, namely
a) The input area is a 4x4 square grid, so you have visual clues to help you with stroke position, length and direction (this is a classic visual aid to learn kanji)
b) Stroke order Aid: there is a button to show you how a kanji is written, with an animation of the different strokes on the second screen.
c) Template Aid: toggle a character template on the main screen so you can trace the character (useful if you've been trying a new character but not making any progress)
d) Once you are happy enough with your attempt at a kanji, the program will give you a score ranging from 0 to 100. So here's where your mind switches from "I don't want to do this" to "I'm not moving on to the next character until I get at least 95 points in this one!!!"
e) After the points there's a review screen with optional feedback, such as stroke accuracy.
f) In the case of kanji characters, you can also see a basic dictionary entry with the readings and examples.

And this is just the study mode, there are also drills to test your progress learning the readings and so on.

This newer version includes features that will prove useful to the foreign learner of Japanese, i.e. the dictionary and stroke order optional feedback (the one after getting a score in the study session, that is) are missing in the previous version. Also full hiragana and katakana practice, though not 100% useful for foreigners as you don't know what sounds they represent, so you rely on an external aid – in which case I'd hint that mnemonic approaches to learning hiragana and katakana make things far more manageable (and memorable).