To display the chain. Just search for used bicycles on some online marketplace and you'll see the majority of them are shown with the chain facing towards the camera.
Well, the drive system, not the chain specifically but yes.
It's actually much less complicated that even that. Consider that there are only two possible sides to show, and one of the sides has the drivetrain on it, whereas the other has basically nothing of importance. It's not much of a choice at all.
It’s less scary because when an LLM messes up, you can roll back its changes, which is much easier to do in NixOS, as opposed to other Linux distros where you have to take filesystem snapshots.
The question this puzzle is asking you is "why do you feel the need to complete this game?" In this sense it is a sand mandala. If you don't have time to make one, that's totally fine, but saying that "sand mandalas don't respect my time" misses the point entirely.