Kingdom Hearts 1 Questions

[Kim]

I know there are some KH fans out there on the forums, and I need your help.

I decided it'd be fun to do an article series on the Kingdom Hearts games, essentially discussing every single Kingdom Hearts game one at a time. A series summary. I do this in part as I feel it'll be useful for those who haven't played the games or haven't played all the games, and even those who've forgotten details because JESUS CHRIST there's a lot of games. I also think it'll be fun to write and probably get at least a decent amount of hits, so that's a plus.

Anywho, I've just finished replaying the first Kingdom Hearts, and wanted to ask KH fans some questions.

1. If Kingdom Hearts is light, why is it full of darkness and Heartless and stuff?

2. Why did Riku have to stay on the other side of the door? I get that Mickey was fighting off the Heartless inside, but why couldn't Riku just leave and push alongside Sora?

3. Do you think Sora didn't go with Kairi because he wanted to stay with Goofy and Donald to find Mickey and Riku, or because he arbitrarily couldn't hop the gap to join her on the island?

4. Are there any plot holes or moments or what-have-you that I should draw attention to? Specifically with no other context than the first game.

5. From what I gather, the Final Mix includes a fight with Xemnas and three more Ansem Reports. Is there anything else of note in the Final Mix version? If so, can you link either a vid of it or something that details it?

Thanks in advance guys! I really appreciate your help!