I guess this wasn't that good because it was so short. It's also not a good idea to have a cartoon that loops like that. Still, I have to give you credit for giving some screen time for the one and only beloved Derpy Hooves! While it was short, it was certainly funny with what she did. I hope you had a great Christmas celebration, because I know I certainly did. The best thing is probably how you keep up that great style of animation.
I even liked the confetti that shows up at the end. It's amazing how many good examples of shading you can show off even with only a few objects. I was expecting a bit more. Derpy is known for having some pretty funny fan voices for her. I'm not even sure if she was the one who said "Muffins" in that one episode.