I think the colour factor makes people learn to associate the colors without recognizing the characters themselves. I do not think this was the best way of doing this. Still, quite good.
Been walking around for a couple of hours now, and I can't seem to find out what to do next... There doesn't seem to be any more items to pick up, and the items I have I can't use anywhere...
 "Let's Learn Japanese! Hiragana"){kind=icon}
 "Crush Crush"){kind=icon}
 "monopoley"){kind=icon}
 "Zombo Buster"){kind=icon}
 "Feudalism II"){kind=icon}
 "An Epic Minimal Adventure"){kind=icon}
 "Super Invaders"){kind=icon}
 "The Last Door - Chapter 1: The Letter"){kind=icon}