The reason most of you are having trouble is because you are choosing manual and ps2 didn't have that option. It was set on auto automatically so do not choose manual and you will like the camera views better.
I remember originally getting Kingdom Hearts back when I was in 5th grade. Now I'm a 21 year old male and LOVED replaying this game. Not only that, but I got to play chain of memories as well, which I had never done. This single disc, if you count the Riku storyline in CoM as a separate game, is essentially FOUR games in one. And I love the Kingdom Hearts storyline. Other than it being a little bit cornier than I remember, this game is as much fun now as it was 10 years ago.
Just overall not a very fun game. The camera is not good and makes it hard to target enemies. Your party members stink in battle. And the story line is not good enough to keep you interested and fight through the short comings. Give it a shot if you want maybe you will like it but as someone said before me it's probably better for little kids because the only thing good in this game is if you get excited seeing the disney characters.