The animation was well timed to the beat of the music.
There could have been a few more motion tweens.
There should have been more tween frames, like on the deer's head moving back and forth instead of a vertical flip.
The bird chasing the butterfly should have been animated a little better, or more stylistically.
I enjoyed the simplistic facial expressions and the body movements to convey fear.
The ending was literally bombastic to say the least, exploding sun.
The fantasy element of the exploding sun and the globe Earth disrupted my suspension of disbelief since the Earth is obviously flat, just check out the curvature at 8inches squared/mile if you doubt me.
Overall great animation for only 3 days. A little more polish on the animation would have gotten you a 4 or 4.5 star rating from me.

Great color choices, good drawings. There was no 'crappy animation' here. You even had some good techniques when showing the fast motion. The low ratings are probably in part from the lack of happy endings. Nice that you included the Sun expansion in this. That was a clever connection, in my view.