Your character designs are great and the animation is pretty good for the most part. The story is coherent and clocking in at 8 minutes this is quite the effort! However, the audio is where it all falls apart. The music just feels like, well, music. There is no weight, there is no impact. It does not work to heighten the animation and it makes the whole animation feel empty. Sound effects would have added life to these characters, it would have had them feel like they take up space. Using the "music cues" makes it sound like a bad fairly oddparents episode.
All in all though, congrats on finishing the film!