It is a game for kids. The game is really 99% influenced by Disney, but scattered with a few FF characters and battle style to lure in some Square fans (or maybe, to train the next generation into becoming Square fans themselves). Every world and every playable character except for one is either original or Disney-themed. While it's no Dora the Explorer, I wouldn't recommend it anyone over 15 unless they're into Disney or want some Disney nostalgia.
KH2 is a little more serious than its predecessor, sure, but that's like saying a beetle is a little bigger than an ant. They even censored it for US audiences (I believe that they changes something to do with the Fire spell), something I've very rarely seen outside a SNES game. They wouldn't do that if it was aimed at adults. My prognosis: While I like the KH series, I would definitely agree with the guy who called it a baby game.
