@01:02After watching the whole film, I understood why you didn't show the door opening, but it doesn't look very good as it is; a little time with the door closed would have felt much better. Instead of how you did, maybe you could have used another point of view, or some way of covering the door for the spectator, perhaps using the ball. And her hand should be touching the door, not hovering in front of it :b
Animation wise, there are a few mistakes, but there are other little details that stand out great
What, did they use to play together, and painted that mural together, and their friendship eventually deteriorated, but seeing that memory hit her nostalgia hard and she was like "hey you were pretty cool let's be friends again"
The characters were really simple, but I don't think that's a bad thing. My favorite part was watching the boy walk over to the ball--the sound of bare feet slapping the wood was perfect, and I don't think enough people respect how difficult it is to get little bits like that just right--it's a lot easier to make big active movements than it is to make subtle, emotive movements like those, and you do them well.
Did you do all of the work on this yourself? If so, that's really impressive. I think my only criticism is that your lighting could use a little work. I can appreciate the emotional contrast you were going for, but I think if you gave his room a little more of a warm bounce light from that strong shaft of sunlight, it could still be dark and enclosed, but have a little more depth.
Really though, this was a year well spent. Congrats!