Quite Endearing.
I have to say, I was rather surprised with how quickly this drew me in. For being a relatively short animation you sure were able to create some impressive emotional depth. A sort of quiet depth, if you will. The animation style was simple, but also quite unique with your use of solid colors and outlines. I'm not sure what they indicate, but I found it something to muse over in the back of my mind as I watched. The story was nice and simple for such a short film, but has just enough breadth to it to invite multiple viewings.
On the other side of things, I must praise the decision to use minimal sound effects and the complete absence dialogue. With such a quiet and subtle tune, such things might have distracted, but instead you've managed to make the animation speak to the music without overshadowing it. An excellent fusion of the visual and aural. Despite the somewhat somber palette and tone, I find this oddly heartwarming and adorable piece something to come back to.