The PDF format (especially PWYW on Itch.io) signals a DIY ethic. The document explicitly tells you: Want critical hits? On a 6, roll again. Want magic? Spend a resource to roll with Advantage.
The primal ancestor. In RfS , you start with only one skill: "Do anything 1." You gain new skills by failing. The PDF is free and legendary. Search for "Roll for Shoes PDF." play 1d6 against everything pdf