Fantastic use of color simplicity. It's a throwback to the books covers and posters of the 60s and 70s that did some much with the limitations of color printing. Your positive and negative space breakdown is pretty cool too
Love! The fireies look so realistic (err...as realistic as puppets can be haha!) If I were Sarah I wouldn't be so nice to them after they nearly took of my head! But that's in her character, I guess. She looks very pretty too!