Music

https://www.assetstore.unity3d.com/en/#!/search/page=1/sortby=relevance/query=publisher:4078

Icons

https://www.flaticon.com/free-icon/gamepad_294669 - Icon made by https://www.flaticon.com/authors/nikita-golubev from www.flaticon.com

https://www.flaticon.com/free-icon/infinite-mathematical-symbol_43410 - Icon made by https://www.flaticon.com/authors/freepik from www.flaticon.com

https://www.flaticon.com/free-icon/rotating-arrow-to-the-left_17071 - Icon made by https://www.flaticon.com/authors/freepik from www.flaticon.com

https://www.flaticon.com/free-icon/computer-mouse_75363 - Icon made by https://www.flaticon.com/authors/freepik from www.flaticon.com