I think the smile have much power and adorable, this character is very cute. and I adore the background, you use the curving lines in the sky area and use some different sky colors, I feel this way make very interesting art effect, the curving line on sky, ground and tree make the good atmosphere of this art and it differentiate the solid rock and pink flowers, the curving horizon line make me imagine of the out of this area over a few high hill area, the background looks very extensive and the flat color make the amazing art world.