I think you only have two options here: 1 star or 5 stars.
I really feel sorry for those who cannot see the beauty of this work of art in its totallity, which includes what you see and hear on the screen, plus the story behind its creation, plus the message highlited in this fable.
I almost understand how can some people opt for the 1 star, but I hope (because this is indeed a hopeful film) that these same people will someday find a 5 star more appropriate.
I know this review is vague (almost non-existent), but I can assure you that it fits the film.
My recommendation is this: Do not pass on the opportunity to experience Megalopolis in some form, preferably, on the big screen.