JavaScript-Quiz-App VS js-music-player

can someone point me in the right direction please, you can find the entire code here https://github.com/WebDevSimplified/JavaScript-Quiz-App/blob/master/script.js

Quiz apps are a fun way to improve your skills as a JavaScript developer. In this project, questions are dynamically generated using an object constructor. You have the 'Retake Quiz' option available at the end :) Key concepts covered :- 1.) JavaScript CSS Manipulation 2.) JavaScript DOM Manipulation 3.) event listeners 4.) Math.random() 5.) Objects Source Code:- Quiz app

In this application, you will be creating a music player with a clean user interface that can be used to play music in the browser. You will also implement features like seeking and volume control. Key concepts covered :- 1.) Jquery 2.) DOM Manipulation 3.) Array of objects 4.) event listeners 5.) CSS Manipulation 6.) setInterval(), clearInterval() 7.) Math.floor() , Math.random() and much more... Source Code :- Music Player