Hot Spot Functionality

Hi

I've created a series of hot spot slides where users listen to some audio and then select an image on the screen in answer to the audio they here.

I'm trying to add a button (or image) to the hot spot slides that users can click to listen to the audio again before selecting their hot spot image answer. However, when I add a button to the slide it acts as one of the hot spot images and instead of playing the audio again it assumes the clicked button as a submitted answer.

Users are going to be children so I don't really want to have to get them to double-click their submitted answers and single click listen again buttons as this will cause confusion. For the same reason I also don't want them to have to click a separate submit button to submit their selected answer. 

Any ideas on how to get around this please?