Are you asking people to not join your multiplayer lobby? Once the game has started, people can't join you. Although if they enter the lobby before you start the game, there's not much way of getting them out...I didn't really expect the sudden uptick in attention, lol
Ah; I looked through your profile, and it seems like you're running the game on a phone? While a decent phone can run it, the game is intended and optimised for PC. It's likely you just don't have a good enough phone.
