game.js

function create() {
    game.stage.backgroundColor = '#2d2d2d';

    player = game.add.sprite(0, 0, 'char'); //spawning our player

    player.animations.add('down', [0, 1, 2], 10); //adding animations
    player.animations.add('left', [12, 13, 14], 10);
    player.animations.add('right', [24, 25, 26], 10);
    player.animations.add('up', [36, 37, 38], 10);

    player.body.collideWorldBounds = true; 

    //create a new ws connection and send our position to others
    sock = new WebSocket("ws://" + ip + ":3000/ws");
    sock.onopen = function() {
        var pos = JSON.stringify({
            x: player.x,
            y: player.y
        });
        sock.send(pos);
    };

    // when we receive a message we spawn, destroy or update a player's position
    // depending on the message's content
    sock.onmessage = function(message) {
        var m = JSON.parse(message.data);
        if (m.New) {
            players[m.Id] = spawn(m);
        } else if (m.Online === false) {
            players[m.Id].label.destroy();
            players[m.Id].destroy();
        } else {
            uPosition(m);
        }
    };
}