Interesting visually
...but what's with the floating landscape? That's just weird.
My problem with such tales is the over-romanticization of tribal cultures. The reality is bloodier, less eco-friendly and more oppressive for anyone who isn't a 'tough guy' ready to bloody knuckles and faces. The average rate of inter-personal violence in such is typically 2-4 times higher than civilization and inter-tribal warfare is endemic. Sure, that's how humans have evolved, but the aliens in this movie seem all too human. More humane behaviour has come from civilization - it never came out of tribal/feudal culture.