HTML/CSS - Archery Game v.3.0.1 Online Editor and JavaScript Compiler

html

<!DOCTYPE html>
<html>
    <head>
       <title>Archery Game</title>
           <meta name="viewport" content="width=device-width, initial-scale=1" >
       <meta charset="utf-8">
    </head>
    <body>
        <div id="mainContainer">
        <canvas id="myCanvas"></canvas>
        <canvas id="animCanvas"></canvas>
        <h1 id="score">0</h1>
        <div id="showPoint">
            <div id="timerDiv"></div>
            <p id="arrs">&uarr;</p><span class="u">&uarr; +4</span>
            
        </div>
        <div id="startMenu">
            <h1 id="title"><span style="font-size:50px">A</span>RCHERY<br><span style="font-size:50px">G</span>AME</h1>
            <button>TAP TO START</button>
            <h2><span id="best">0</span><br>Best</h2>
            <a id="buymeacoffee" href="https://www.buymeacoffee.com/adnanzawad" target="_blank" rel="noopener noreferrer">
                <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me a Coffee" style="height: 51px !important; width: 217px !important;">
            </a>
        </div>
    </div>
    </body>
</html>

css

body {
    margin: 0;
    font-family:monospace;
    text-align:center;
    height: 100vh;
    width: 100vw;
}
#buymeacoffee {
    z-index: 10000;
    position: relative;
    top: 10px;
    width: 100%;
    display: block;
    text-align: center;
}
#buymeacoffee img {
    box-shadow: 0px 2px 6px  rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}
#mainContainer {
    transform-origin:0% 0%;
    position:absolute;
    width:100%;
    top:0;
    left:0;

//Thanks for visiting my code
//Created By : Adnan Zawad Toky
//Idea & Sounds : Archery Black
//Version : 3.0.1
//If you enjoy playing this game, don't forget to appreciate
//If you have any idea or feedback, please comment...
window.onload = function(){
alert("Thanks everyone (specially SoloLearn) for making my code as Code Of The Day...\n👍👍👍")
alert("Please make sure that your device is not in silent mode...");
String.prototype.repeat =  String.prototype.repeat ||
  function(c){
    var r= '';
    for(var i=0; i<c; ++i);
        r += this;
    return r;
}
var asrcd = "toky";
var startPage = document.getElementById("startMenu");
startPage.addEventListener("click",startGame)
function startGame(){
    startPage.style.display = "none";
    loadGame();
    try{

BROWSER

Console