I wouldn’t particularly see starting at the end of the game and rewinding as a literal interpretation (as such would be more of the colloquial interpretation). But I hadn’t initially considered ideas of school and new year. There is a lot that can be drawn from ideas of growth and renewal. You could even fit a survival aspect into this theme along the lines of someone getting fed up with society and “going back to square one” by heading out to a forest and you do the ol’ “Don’t Starve” harvesting and building to reach a climax of appreciating a simple life without modern conveniences. Its really about abstractly looking at the many ways in which you can draw gameplay elements from a single source. But I can’t personally think of any way to involve Pi. 