What do you think of the iOS podcasts app then? I have no idea of where to press to view details of a podcast, vs to start playing it. On the main page, the black text starts playing a podcast, and the purple text shows details. Further into the app, the purple text will start playing while the black text will view details. While playing, neither the purple nor black text do anything (they act as title/subtitle). Clicking on a picture is also pretty unpredictable.

This is admittedly not a flat vs non-flat design problem, but it is exacerbated by the flat design. If actions which started something playing were outlined or something, it would be so much easier to use.