This is beautiful. Plain and simple. The art, the voicework, and especially the way the ending works with the entire movie. I love movies that make me go back and watch it a 2nd time, from a new perspective.
I thought the small details were really cool... especially when the main character throws his arm around his friend and says "That's why I considered you the best friend I ever had..."
Why would he say "had" if they're still friends?? Because he's f*@!ng time traveling! MINDF*!&.
Incredible job. I'm not into animating but this is something animators should strive for... beautiful animation and a beautiful story.