You can't pretend to do an anime about science and then have such huge plot holes and lack of logic in the story so often. It's just ridiculously upsetting.
Just the most basic fact: the story of how the village has been created is clearly scientifically impossible. And it's like that all the time throughout the anime. Character's reactions often lack basic logic, and why do they have to describe and comment everything everyone does, even the most basic things?
Apart from that, the character development is pretty good, and all the adventure and discovery parts are interesting. It's just really upsetting, to lack such logic in an anime all about logic. Ugh.
