I really liked the animation in this is wasn't perfect but I liked that. For three weeks work I think this is amazing. However, I did have one issue with the animation and that was the movement of the water (mainly the bit where the fish were swimming), while I knew this was meant to be moving water my eyes just couldn't process it like that. If that was cleared up then I would rate this as a 5 star.
I also enjoyed the story, while it wasn't perfectly clear what was happening in the story I though that was a good thing, seeing that the audience can take what is most relevant to them from it (Be it dreams of flying on a magical creature, going to the depths of the ocean or experiencing the loss of a loved one).