I added sound manager to my game. It isn't perfect because there issue with handling multiple sound effects, so I'm working to fix that.
The music pieces I used are called:
AdhesiveWombat - 8 bit Adventure - https://youtu.be/0HxZn6CzOIo
Pixel Kingdoms - https://youtu.be/qWCLauk9oNo
Dev log Gameplay - https://youtu.be/ivdLaW01a4E