To make a skin actually usable you really should add at least ffwd/rewind, skip fwd/back, pause/play and a button to get back to the menu.
it is also nice to make the repeat and shuffle mode icons buttons, and the volume display a button also.
looking at the terminal theme it just wont work without wrecking the theme, but you might be able to pop up a button menu using conditional viewports and the %Tl (last touch) tag