js IE "" `` 連結

前提・実現したいこと

お世話になります、js初心者です。
jsで簡単なゲームを作成しているのですが、
IEのみゲーム画面が表示されません。

該当のソースコード

// マップデータ
var maze = [
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [3, 0, 0, 0, 0, 0, 0],
]

// testlog
var test = {
    position: {
        player: 0,
        player: 0
    },
};
console.log(test.position.player)

// playerはオブジェクト配列にする
var player = [0, 0]
var bag = 0
var ROWS = 7
var COLS = 7
var EMPTY = 0
var WALL = 1
var PLAYER = 2
var EXIT = 3
var EXIT_READY = 6
var FRAG = 4
var FRAG_COUNT = 1

// ロード
window.onload = () => {
    generateFrag()
    createBoard()
    createMap()
}

var generateFrag = () => {
    var count = 0

    do {
        var row = Math.floor(Math.random() * ROWS)
        var col = Math.floor(Math.random() * COLS)
        if (maze[row][col] === EMPTY &&
            row !== 0 && col !== 0 &&
            row !== ROWS - 1 && col !== COLS - 1) {
            maze[row][col] = FRAG
            count++
        }
    }
    while (count !== FRAG_COUNT)
}

// ゲームパネル
var createBoard = () => {
    for (var row = 0; row < ROWS; row++) {
        for (var col = 0; col < COLS; col++) {
            var block = document.createElement("div")
            block.id = `id-${col}-${row}`
            document.querySelector(".board").appendChild(block);
        }
    }
}

var createMap = () => {
    for (var row = 0; row < ROWS; row++) {
        for (var col = 0; col < COLS; col++) {
            var itemClass = ''
            switch (maze[row][col]) {
                case PLAYER:
                    itemClass = "player";
                    break
                case WALL:
                    itemClass = "wall";
                    break
                case PLAYER:
                    itemClass = "human";
                    break
                case EXIT:
                    itemClass = "exit";
                    break
                case EXIT_READY:
                    itemClass = "exit show";
                    break
                default:
                    itemClass = "empty"
            }
            var id = `#id-${col}-${row}`

            document.querySelector(id).className = `block ${itemClass}`
        }
    }
    var id = `#id-${player[1]}-${player[0]}`
    if (!(bag === FRAG_COUNT && player[1] === COLS - 1 && player[0] === ROWS - 1)) {
        document.querySelector(id).className = "block player"
    }
}