Cute. And brave to make alien invasion the subject of a children movie. Nicely done. We have humans in concentration camps, and aliens convinced that they are the saviors and humans should be thankful. This was is a very good translation of war, war crimes to children. The plot is by no means a simplistic one. It twists and turns and allows to contrast human concepts to the aliens's behavior and thinking.
The animation is really limited and poor but there's a lot of multiculture in the movie and the main character has a different type of body and i think that matters. Shading the consumerism and the exploitation of animals comparing them to humans did it for me.