I like the idea here, it's really cute. The problem is the execution doesn't quite live up to the idea. The audio sounds distant and faded, almost as if it was played from an audio source and then recorded with a low-quality microphone. The characters look good but their animations are a little strange. For example when the unicorn gets eaten it just goes behind the head rather than into the mouth. That said, however, the animation does look really smooth! As a personal note I'd like to see a bit of background work done here, but that may be an intentional stylistic choice.

Overall though, I do like this :) keep it up.