Color Saturation and Hue: Excellent. Skin tones are prefectly rendered. I really enjoy all the nice bright colors so crisply done. Very nice! Brightness and Contrast: Excellent as well. Details are not lost in shadows, nor are details blown out in highlight areas.
Focus and Depth of Field: Focus is nice and sharp. Depth of Field is a bit shallow, as evidenced by the softness in her hair at the edges. I would have preferred it shaper.
Although you have broken the rule of thirds, by centering the subject, some rules are made to be broken. This image really works because of the subjects. Their smiles light up this picture. I like just about everything about this picture, the lighting, the pose, the colors... I am suprised that it did not score higher than it did.