No you don't. What you are describing is a functional cookie, which does not require permission. If you want to share peoples high scores then just let them ch

No you don't. What you are describing is a functional cookie, which does not require permission. If you want to share peoples high scores then just let them choose to share it or not when they get the high score. Also your game is cool, but I thought that the winner got to keep a die? Having less information makes the game harder, not easier.