Its a start, an interesting one
You have added sound, though, improving your animation skills and graphics should be your next step. For example, when he walked, he would walk one step back, probably to do with how you done it on the timeline. The graphics werent that great, though, practice will make it better over time. Another should be shaping the cake so its not as big as two heads put together, how the guy in the animation eat that I have no idea, I'll give him that. Sound and speech should match the animation, so, more dramatic, as the speech was a bit unclear in some parts.
It wasnt that good but it had an interesting and 'cute' plot, as Lazarou put it. 2/10.