House rule: the cool kids know this stuff. Score 70% or better and you are a fan. Anything under that and you are a fraud.
Pick a name and a four-digit PIN. Same two next time and your scores follow you to any phone or laptop.
New name, new account. Name you have used before, same PIN gets you back in. Forget the PIN and I will have to reset it for you — it is stored scrambled, so nobody can read it back.