game.js

var buttonColors = ["red", "blue", "green", "yellow"];

var gamePattern = [];
var userClickedPattern = [];

var playing = false;
var level = 0;


$(".btn").click(function () {

    var userChosenColor = $(this).attr("id"); //this.id; 
    userClickedPattern.push(userChosenColor);
    console.log(userClickedPattern);
    console.log(gamePattern);
    playSound(userChosenColor);
    animatePress(userChosenColor);
    checkAnswer(userClickedPattern.length - 1);
});

function nextSequence() {

    userClickedPattern = [];

    level++;

    $("#level-title").text("Level " + level);

    var randomNumber = Math.floor(Math.random() * 4);
    var randomChosenColor = buttonColors[randomNumber];
    gamePattern.push(randomChosenColor);

    $("#" + randomChosenColor).fadeIn(100).fadeOut(100).fadeIn(100);

    playSound(randomChosenColor);


}

function playSound(name) {

    var audio = new Audio("sounds/" + name + ".mp3");
    audio.play();

}

function animatePress(currentColor) {
    $("#" + currentColor).addClass("pressed");

    setTimeout(() => {
        $("#" + currentColor).removeClass("pressed");
    }, 100);
}


$(document).keypress(() => {
    if (!playing) {
        $('#level-title').text("Level " + level);
        nextSequence();
        playing = true;
    }
});

function checkAnswer(currentLevel) {
    if (userClickedPattern[currentLevel] === gamePattern[currentLevel]) {
        console.log("Success");
        if (userClickedPattern.length === gamePattern.length) {
            setTimeout(() => {
                nextSequence();
            }, 1000);
        }
    }
    else {
        console.log("Wrong");
        playSound("wrong");

        $("body").addClass("game-over");
        setTimeout(function () {
            $("body").removeClass("game-over");
        }, 200);

        $("#level-title").text("Game Over, Press Any Key to Restart");

        startOver();
    }
}

function startOver(){
    level=0;
    gamePattern = [];
    playing = false;

}