The one thing I like about Inside is that it does not at all bother to answer any questions about itself. All the things that RuhRo mentioned, they're largely unexplained, and that's good. And not even in the sense of "we get to intuit these things for ourselves, rad!", but more that as some little kid (or experiment), we would have no idea what's going on. We would have no one there to deliver information to us. On all levels, we're on the outside looking into this dystopian world, and that was really rad, just leaving everything unanswered and unexplained. It's not a matter of why or how, it is just a matter of "it is"