Dreamlike?

It was extremely dreamlike. Particularly (and surely intentionally) when Amy alone is on the screen. The scenes with the parents are generally pretty matter-of-fact, but it's made quite clear that Amy's individual world is a dreamy, mysterious, strange yet beautiful place.

Definitely. It is a lovely tale about loneliness and companionship that has a surreal, fantastical atmosphere about it. It's a beautiful film and one of my favorites.