Hell, I'd give you an A!
This is a tasteful and very thought out piece about the culture and spirituality of Native Americans. But it's so much more! It's also a film about what it is to grow up and become a man. As well, the overall moral of the story is that we must not forget who we are, to be proud of our heritage. Sorry if this comes off as corny.
The feel of your movie is very tranquil, helped by the use of lighter colors, the lack of black outlining, and the soundtrack which, by the way, suits this piece quite well.
This is an excellent movie, Nero! You have a great talent- keep it up!