First, I have to say that I love the music, the main theme does a great job of setting the mood. If it's original, whoever composed it knew what they were doing. Animation is mostly lackluster, though some parts are easily well done. That isn't really a big part of my review score. As long as it's pretty to look at, and the flaws don't distract me too much, you don't suffer. The echo and background noise during voice-overs in the audio are just noticeable most of the time. I noticed it right away because I had the volume turned up at 100%. Again, not a big deal. The voice acting is on par, and the emotions being conveyed are believable. The humor used is simple and predictable, but is well-delivered and effective. Years are just numbers, but clearly a lot of thought was put into this.
Mokota's backstory is a bit old school. Kid grows up in a society that raises its hunters and soldiers from a young age, and he loses a parent or both parents when he's much younger, and he has a deadly premonition that manifests in the future, either as predicted or as a result of his premonition. Don't get me wrong, it could work, it's just cliche.
I want to mention that there's a glitch in the dialogue structure between Mokota and the survivor, when he says "hey!" and then, "you gotta go." The seemingly inattentive vibe Mokota gives off as he stares into the burning village goes unaddressed. There's a pause that feels like a gap that needs to be bridged. I imagine the survivor saying, "listen, you gotta go," or "stop gawking, you gotta go." It feels like something's missing. It's easily ignored, and I'm pointing it out not because I'm demanding you to change it, but because I want to help you get better. I can't speak with experience on animation, but I know a thing or two about plot structure and dialogue.
Bottom line: lot of room for improvement here presentation-wise. To use a metaphor, I can smell something in the kitchen. It smells good, but it's stifled. I'm not getting enough, in a bad way. You gotta open up that oven door.
One more thing: you'd think that in a post-apocalyptic(or pseudo-post-apocalyptic?) setting in which adolescents take on important and mature roles, they'd be more exposed to the more deeply mature elements of human society. So far the only thing I can point out is obscene language, because there doesn't seem to be anything else in the way of mature themes going on around Mokota, which could quickly change as the series progresses, but that's all I got right now. That's just a personal gripe. What can I say, the gore at the beginning got me a little excited.