We need a browser multiplayer game with Node.js and MongoDB

We need simple browser multiplayer game. The server should play a game every 12 hours. All players are assigned to rooms of 16 people in each. Each player in the room has a number from 1 to 16. Depending on this, the players make a move. At each step, a person needs to choose 1 of two options. If a person chooses the wrong option, then he dies.