It is something where if you put this project in 2 windows it does you will see both of them there and they will have two different IDs it will work in more than one window and about 100 different ones You can also backpack it so you can make multiplayer games If you play it at the same time as another person playing it it will Increase the player UID list DO NOT REMIX OR ELSE
Thanks to griffpatch for making a tutorial on YouTube to teach me how to make this DO NOT REMIX I spent 2 days and 12 hours on this I hid most of the variables