I like very much the composition of the picture, the very original greedy decoration, with many elements (lollipop, macaroons, candies and others) which gives an impression of profusion. Colors are very flashy, and I think the characters don't stand out enough of the pattern. However, I like their rolled up pose and the inversions of colors of their clothes.
I was wondering why, but I love it all the same, they're wearing different styles of clothing. It matches their personalities perfectly, but I find it odd nonetheless ... might just be the obsessive compulsive disorder. This being said, I wouldn't want a thing changed. It's perfect.