This would literally make a great anime, (hell, you could say that it IS a bit like an anime)
Anyways, I noticed that some of the story is slightly based on the naruto world (there being a great war before the story, several tribes whom are in conflict) but the person in charge of the story has done well to change the story elements to the point where it becomes a seperate story all together. (the characters are different, dark pasts are different, people's behaviour are different, etc etc)
The graphics were also handled well. All the action seemed quite realistic, although the scenes where "lazy kid" (too lazy to watch it again to figure out his name XD) gets himself into trouble with monsters might require a different approach, every other action scene was done well.
What strikes me most however is the voice acting. It was so diverse and so professionally done, that it amps up the animation to an epic level. This is seriously your strongest point in my opinion.
Overall though, this is a great piece of work, and honestly if this was made into a series, it would be quite epic... So yeah well done xD