I just felt somewhat depressed after playing this
Only because in the end, that is what occurs. It was pretty evoking in that that is what occurs when an end is present. The world ended but it was just the beginning of a new journey. It could have been transitory in that the end of that world was the beginning of the child's or that it was the end of everything and there was no foreseeable alternative, just the end. Regardless of the thought behind it, it was an excellent game.