So some passability issues, such as with desks and diagonal movement. The double lava portions are a bit weird since you end up jumping through the lava.
Cafeteria is spelled Cafetaria in the game?
Cafeteria has no bottom area so it looks odd.
The two characters passing through your characters seems kind of odd when you can't pass through them. Maybe there could be some sort of event there to make all the sprites move?
Stairs have major passability issues.
The puzzle is nice looking, but a bit annoying because you are standing on the tile you are moving so you hide what that tile looks like.
The repeated line about being able to do it all day seems kind of pointless to repeat.
The voice acting was a nice touch, though a bit weird given the lack of voice acting until that point.