I think a nice addition would be a keyboard shortcut for the music manager dropdown in the top right corner, next to your profile. If not – I could understand not wanting this, as it is accessible through Alt + Left + Left – you should add some kind of keyboard controls for this menu. It’s counter-intuitive to be able to reach this menu through the keyboard, but only be able to interact with the mouse. I think if you could use just space and the arrow keys to maneuver through the buttons, and possibly X, Backspace or Del to remove a song.
Thanks for reading, additions are welcome!