The idea seemed simple enough: play the game, learn kanji. And it went pretty well for a while. But when I hit level 3, I realized that it's completely unworkable. The problem is, I need to take the material in small dozes, to allow kanji to get digested. But KanKen only has 10 levels for 10,000 kanji... and the distribution is progressive. I don't know how many were at the level 1, I knew most of them. Level 2 was about 80 kanji: a shade harder. Level 3 went for 230 kanji thus far. By level 5 I'll have to take 800 in one go.

I'm starting to think that I made a mistake; should have gone with Kakitori-kun.