Needs improvement! – Adrian James: Bootcamp Review

Many buttons in this app are unresponsive to the touch (e.g.: the "return to previous screen" button). I was also looking for a bit more of guidance: Am I supposed to do the workout once following the default setup of the app, or repeat a set several times? Or, to make it harder should I just increase the time of each exercise?
Review by Goodtimenyc on Adrian James: Bootcamp.