This is not like goodiebag island, no prize exists until you reach the last person. Only lucky numbers would win if they we're implemented within the event. Also this is a well known game i'd say it was closer to tombola. I mean there is not much to explain about the game, most people can easily understand it and how it functions. Random numbers between the 1-20 are eliminated on a round by round bases (maybe more numbers eliminated per round as the rounds increase) Until you are left with 1 person (winner).
It's a simple game hence why i didn't provide such massive explaination.
///Edit Also I didn't provide information on prizes and such as they are being reworked, I left that for more capable hands this was simply sharing an idea.