Adding functionality to the Game

Hey, I would like to add some additional functionalities for the user:
1) As I noticed, the game window itself doesn't have an exit button which helps the go back to the index page.
2) I would like a add an audio file at the beginning page, as there is no music there, which would make it more appealing. Animations to the text as well to make it fun and appealing.

Ps: This is my first time contributing. I would request you to give a chance as I would like to work on this.