I would like it added so that you could listen to the audio again by hitting space or clicking a button on the screen. I like trying to play the interval on the guitar by ear, and then answering the question (as an example). But unfortunately, it only lets me listen to it once. I can refresh the screen, but then the audio doesn’t play again. For people that want to work on their auditory skills with music, you really need to be able to listen to the interval multiple times to have it stuck in your head.