Well, I finished it.
The whole game is sweet, but never cloying. There's a lot of hope, and yeah, bad stuff happens and people die (*GASP* In a Disney thing?!?!?), but it's triumphant.
I didn't get the "secret" video at the end, and I think I missed one little scene during the credits since I didn't take on the optional boss. I'll definitely replay it on proud mode.