Amazing Movie!
What I found very powerful in this movie was the soundtrack/musical score.
It had that vague familiarity of Christopher Nolan's Batman but the musical score
in this animation was even better! That's the kind of sound/music you need to have accompanying the actors and scenes.
The sound effects were also very detailed and crisp. It's part of the reason why I believe the live action Dark Knight movies did so well.
Looking forward to seeing Part 2!