To be fair, the show lets you know in the first episode that they are not going to be restrained by real Science to tell a story.
Also, I'm pretty sure the writers play Minecraft, because there are different biomes (glacier, forest, desert) within a short walking distance of each other, and they transition about the same way as the video game.
I finally gave up trying to understand the show when one of the characters decide to ride a helium balloon, tied to a chair, into space.