Why does this need a cookie to function? I block cookies by default and I get annoyed every time some site requires a cookie for something mundane like displayi

Why does this need a cookie to function? I block cookies by default and I get annoyed every time some site requires a cookie for something mundane like displaying the time or playing a game that doesn't even preserve state across browser sessions (like 2048) edit: 2048 does indeed restore the game, but it should still work without a cookie.