Uhh , okay , I'm not really a critic , so if you get confused , I'm sorry . xD ----- The color looks dark, as if they were 'shadowed' by something. The character does not have as much of shading as the animal, so it looks uneven. I also prefer the characters (animal and boy) to be bigger (filling up the canvas). That's just my opinion, though. xD the arms could also use a little more detail, and the bangs of the animal look great, but the shading(lightness) looks too bright. But, the background is beautiful, the animal's shape(body) looks great, and the little chibi boy is adorable. That's all from me. ^^
I love the background. Maybe the character and doll thing should take up more space. The doll could do more shading. Overall it looks very attractive. Nice idea and it looks good. The background is very affective and I see it is one of your strengths. Carry on improving! I might say that it looks a bit of a jump in colour combinations as the background is nice and bright and not SO SO bright while the characters are quite dull and plain. Next time maybe think more about colour differences.