JavaScript 2048游戏意外停止

Question

我们处理2048 DOGE2048游戏的确切版本，其中一个带图片，但在达到2048游戏后意外停止。我已经包含了一个连接一个2x1024 2048时调用的文件

function HTMLActuator() {
  this.tileContainer    = document.querySelector(".tile-container");
  this.scoreContainer   = document.querySelector(".score-container");
  this.bestContainer    = document.querySelector(".best-container");
  this.messageContainer = document.querySelector(".game-message");
  this.info             = document.querySelector(".info");  
  this.dogeSays = document.querySelector(".doge-says");
  this.adSpace = document.querySelector(".shout-out");

  this.score = 0;
}


var ads = [

  '<a href="https://itunes.apple.com/us/app/snack-compass/id646138186?mt=8&ign-mpt=uo%3D4" target="_blank">Like Pizza?</a>',
  '<a href="http://maxhash.com/doge" target="_blank">Check out everything hashtagged Doge!</a>',
]

HTMLActuator.prototype.actuate = function (grid, metadata) {
  var self = this;

  window.requestAnimationFrame(function () {
    self.clearContainer(self.tileContainer);

    grid.cells.forEach(function (column) {
      column.forEach(function (cell) {
        if (cell) {
          self.addTile(cell);
        }
      });
    });

    self.updateScore(metadata.score);
    self.updateBestScore(metadata.bestScore);

    if (metadata.terminated) {
      if (metadata.over) {
        self.message(false); // You lose
      } else if (metadata.won) {
        self.message(true); // You win!
      }
    }

  });
};

// Continues the game (both restart and keep playing)
HTMLActuator.prototype.continue = function () {
  this.clearMessage();
};

HTMLActuator.prototype.clearContainer = function (container) {
  while (container.firstChild) {
    container.removeChild(container.firstChild);
  }
};

HTMLActuator.prototype.addTile = function (tile) {
  var self = this;

  var wrapper   = document.createElement("div");
  var inner     = document.createElement("div");
  var position  = tile.previousPosition || { x: tile.x, y: tile.y };
  var positionClass = this.positionClass(position);

  // We can't use classlist because it somehow glitches when replacing classes
  var classes = ["tile", "tile-" + tile.value, positionClass];



  this.applyClasses(wrapper, classes);

  inner.classList.add("tile-inner");
  inner.textContent = tile.value;

  if (tile.previousPosition) {
    // Make sure that the tile gets rendered in the previous position first
    window.requestAnimationFrame(function () {
      classes[2] = self.positionClass({ x: tile.x, y: tile.y });
      self.applyClasses(wrapper, classes); // Update the position
    });
  } else if (tile.mergedFrom) {
    classes.push("tile-merged");
    this.applyClasses(wrapper, classes);

    // Render the tiles that merged
    tile.mergedFrom.forEach(function (merged) {
      self.addTile(merged);
    });
  } else {
    classes.push("tile-new");
    this.applyClasses(wrapper, classes);
  }

  // Add the inner part of the tile to the wrapper
  wrapper.appendChild(inner);

  // Put the tile on the board
  this.tileContainer.appendChild(wrapper);
};

HTMLActuator.prototype.applyClasses = function (element, classes) {
  element.setAttribute("class", classes.join(" "));
};

HTMLActuator.prototype.normalizePosition = function (position) {
  return { x: position.x + 1, y: position.y + 1 };
};

HTMLActuator.prototype.positionClass = function (position) {
  position = this.normalizePosition(position);
  return "tile-position-" + position.x + "-" + position.y;
};

HTMLActuator.prototype.updateScore = function (score) {
  this.clearContainer(this.scoreContainer);
  this.clearContainer(this.dogeSays)

  var difference = score - this.score;
  this.score = score;

  this.scoreContainer.textContent = this.score;

  if (difference > 0) {
    var addition = document.createElement("div");
    addition.classList.add("score-addition");
    addition.textContent = "+" + difference;
    this.scoreContainer.appendChild(addition);


    if (difference > 4) {
     this.adSpace.innerHTML = ads[Math.floor(Math.random() * ads.length)]
    }

  }
};

HTMLActuator.prototype.updateBestScore = function (bestScore) {
  this.bestContainer.textContent = bestScore;
};

HTMLActuator.prototype.message = function (won) {
  var type    = won ? "game-won" : "game-over";
  var message = won ? "You win!" : "Game over!";

  this.messageContainer.classList.add(type);
  this.messageContainer.getElementsByTagName("p")[0].textContent = message;
};

HTMLActuator.prototype.clearMessage = function () {
  // IE only takes one value to remove at a time.
  this.messageContainer.classList.remove("game-won");
  this.messageContainer.classList.remove("game-over");
};


HTMLActuator.prototype.showInfo = function () {
  if ( this.info.getAttribute('style') === "display:block;"){
    this.info.setAttribute('style','display:none;')
    document.querySelector('.show-info').innerHTML = 'INFO';
  } else {
    this.info.setAttribute('style','display:block;') 
    document.querySelector('.show-info').innerHTML = 'CLOSE';
  }
}


HTMLActuator.prototype.hideInfo = function () {
    this.info.setAttribute('style','display:none;')
}

这里有一个Game登录详细信息 登录：Kubol 密码：cytryna123 根据我对这些代码行的挑选：

grid.cells.forEach(function (column) {
  column.forEach(function (cell) {
    if (cell) {
      self.addTile(cell);
    }
  });
});

和

tile.mergedFrom.forEach(function (merged) {
  self.addTile(merged);
});

和

  // Put the tile on the board
  this.tileContainer.appendChild(wrapper);

任何人都可以帮助我？