If the screen is on when the alarm goes off I'm presented with 2 buttons to choose: Snooze and Dismiss. These seem to work as I would expect. If, however, the screen is off before the alarm goes off I see a "Snooze" button followed by an instruction to Drag down to dismiss. If I try to drag the Snooze button (as instructed) nothing seems to happen. However, if I drag down the arc-shaped bar above the button this seems to Dismiss.