Squid Game in a mall

Hello everyone.
I’ve been tasked with creating the classic game from Squid Game, where you move toward a doll and must stand perfectly still when the doll turns around. It will be displayed on digital screens in a mall, in a large open area, and the request is that up to five people can compete against each other.
What sensors are best for such a scenario?
How do you separate the players?
Where do I start?
I know it’s a broad question, and I would appreciate any help I can get.