A satisfying end to a great ride.
It's difficult to add impact or emotion to scenes without adding any sort of dialogue, so I have to give you credit here. It's not easy to make every character voiceless without it feeling empty.
The art style was pleasing to look at, especially with the backgrounds and lighting complimenting it. The colors weren't bland and flat, but they also weren't neon and eye-numbing. It fit like a glove with the art style and the tone.
The animation felt flowing (especially when characters were running). It didn't overdo what it was supposed to convey. If I had one complaint, though, it'd be when the young boy and the dog were walking through the city, away from the shelter. The dog looked awkward in that shot. I can't see anything else wrong with the animation besides that.
An excellent job all around. I'll make sure to keep track of all your new projects.