certainly a cute project, but it still suffers from growing pains. on a high-res monitor, the controller is too small to be legible. long track names run off the display without any scrolling. you have to click twice to be able to drag it (once to bring it to the foreground, second to select it), unlike other apps where you activate the foreground and gain control with the first click.

obviously it's not as practical as a menubar/hotkey controller even if it were perfect, but it's free and has potential for some future fun, with further development.