How do I make my X2 speed gamepass work?

well, can you include your script?

"I know a little about roblox scripting" isn't an excuse for asking people to make you scrinpts. You gotta learn and do some research yourself and you will hit you aim, if you get stuck somewhere or your script errors we would be more than glad to help

I can't tell you exactly how to do it but I would look into marketplaceservice and humanoid.Walkspeed

i cant give you a script but what you could say is if play owns the gamepass then the player gets the script in their backpack that holds the extra speed

https://developer.roblox.com/articles/Game-Passes-One-Time-Purchases https://scriptinghelpers.org/help/how-post-good-questions-answers