Incredible! This definitely deserves 5 stars!

Yeah, this animation doesn't have a good quality of animation, but it's compensated by a good narration and a good execution when showing history:
I've only seen this chapter, and from what I could see, this quickly introduce me the context, which are the rules that govern this universe, and what is the plot.
I alredy know if I'll like it or not, and for me, that's a good indicator.
Surely many will criticize me, but the first thing that occurred to me when i saw this, was that I found it more interesting and engaging than "Attack of the Titans".

Keep up the good work!

PD: I like Clint Mansell, but I agree with VacantVirtuoso about the music, you could replace the music with some tracks of the audio portal, or use some tracks of music group "epic score", which as I understand is free for such cases.

artstyle could be improved but the story kind of makes up for it, this is probably your best episode so far, kind of wish you had gotten someone to do the audio tracks for you instead of using copyrighted music in parts though.

Deserves a spot on the first page

Great, cant wait to see more!