1. First, open the Goose and Duck game and start the game. During the game, press the "Command Tab" key combination on the keyboard to switch to the desktop.

2. Secondly, open the music player and select the music track you want to play.

3. Finally, press the "Command Tab" key combination on the keyboard to switch back to the Goose and Duck game interface. The music will continue to play, and you can continue to play in the Goose and Duck game.