Reminds Me of Avatar
In a weird way, this is like Avatar if Avatar were good. Blue-skinned, alien inhabitants of a "back-to-nature" hippy-ish space civilization are being assaulted by technologically-superior aggressors. It goes to much more interesting places, of course. It serves to highlight how lazy Avatar's writing is, given the immense creativity of this story.
The animation is really cool, the world is fantastic, and the plot is all-stops-pulled. Well worth viewing, especially at the breezy 84 minute runtime.