Make play/pause button larger?

I interact with Roon all day at my desk, using an Android tablet (and sometimes an iPad) as my controller. The number one thing I do is hit the play/pause button. As these devices do not usually have a keyboard attached, to pause (or play) music I need to tap a button that currently occupies less than 1% of the screen real-estate.

Can I please request some thinking as to how to make this action easier on tablets?