The Moopets come off a bit creepy, but that's proably the intent. I find them especially creepy in the poster, where they are for the most part hidden among the big amount of Muppets. And also, whoever did the photoshopping made a mistake; The Moopet resembling Janice is at the bottom, going up to half the face, and then the top of her face is creeped up above Bunsen. Physics-wise, that wouldn't be possible. And based on what I read in the thread from the person who saw an early screening and what I read in the junior movie novelization (where she's not even mentioned), I assume she can't stretch her head or make half the head float off her body or anythign like that (and I assume there's only one Janice Moopet).