Given its compact size, you may decide Music MiniPlayer can remain visible at all times on your Desktop. To do so, enable this option by going to the menu bar and selecting:
Window > Keep Above All Other Windows
Alternative methods
Open the Preferences window, and placing a checkmark on “Keep Above All Other Windows” under the Interface tab.
Control-click the Music MiniPlayer icon in the Dock and select “Keep Above All Other Windows” from the menu.