Cute little cartoon! It was funny & charming enough to be enjoyable, but the voice acting needed a bit more "oomph" for it to have been convincing. For instance, the kid's sarcasm didn't quite come through too well and therefore hurt the joke of his snarky behaviour.
The visual style fit (or rather set) the tone nicely, and the facial expressions were great. And the concept was a funny one. Good job!