I guess in the fact they are shrunk, but it's not amusing.

It could have gone down an interesting human rights or environmental angle, and it did brush those topics, but didn't bother.

no, and no

He is not involved in the process at all, it's done to him and seems quite scary

It seems to be more of a social / relationship exploration

but, as Ant says, no real idea of what it's trying to do/say