Critique time! As I don't see that it's critiqueable (unless I'm blind, in which case, slap me), I'll comment-critique.
Possitives first. ADORABLE. The whole thing. Adorable. I want to squish it. c: The animation on the maracas, and how you were able to bring them from one side of the canvas to the other, is flawless. The shading is also great on the emote, but--
Negatives now. I could barely see the mouth and the eyes look too round and buggy for me (maybe if they were longer up and down or blinked every now and again). I also dislike how it bounces up and down--seems a bit choppy. I'd either do it less often or add in another frame where it goes one more pixel down or something along those lines. I also see no shading (or if there is, none noticeable) on the maracas themselves. Work on that.
Overall, very cute. And good animation. I can just hear it in my head jingling its wiwwle maracas. c:
This is such a cute and clever idea, but I think there should be a little more in the transition from one side to the other. Like another frame or two, or like a blur or something. It just seems a little choppy.