code: function() {
      // Loop through the tiles and setup the audio listeners.
      for (var i=0; i<this.grid.length; i++) {
        if (this.grid[i] === 2) {
          var y = Math.floor(i / this.size);
          var x = i % this.size;
          game.audio.speaker(x, y);
        }
      }
    }
docs: Sets up the map including the speaker audio points.