Thanks for sharing your suggestions with us, we love hearing what would make Focused better.
The key sounds are already on the list and we are hoping to get them into the next update and the same is true of being able to select other fonts as well. We are looking at other sound racks that could be added at the moment so your suggestions are perfectly time
The volume control on the soundtracks is a great idea and I've added that to the list.
Thanks again for the feedback and watch this space.