I think the main point of this film is how destruction of nature affects to human's living. Some of them could live without nature, but most of them were sick. Those who weren't sick might had mental illness because there's no nature and landscape never changes.
2)What do you think about the film?
When animals came dragging many buildings, I was scared. That was kind of horrible scene.
Then the fancy animal lived there, too. First, I thought he could get out of there, but even outside of the city, there's no nature and he couldn't go anywhere. We can go somewhere from where we are, but is it the real escape? We can plant some seeding or something, and it's going to make a fruit. That is more productive. It will make some effect, it doesn't matter if that is good or bad.
3)What happens in the end of the movie?
The creatures like jellyfish represent nature, but nature had already gone.
They took fancy animals with their tentacles and put them into their body.
In their body, there's still nature, but it is kind of dream. We can't get back what we lost.
The jellyfish represents death, too.
The city was broke down, at least the fancy animals felt so, but the city was still there.
In short, they died and by the jellyfish they could be together with nature.