Shake to snooze
It would be helpful to be able to shake the phone to snooze an alarm.
I need my alarms to nag me. But if I'm driving (or doing something where it's inconvenient to shift my attention to the alarm) it would be very helpful to be able to select a fixed time to snooze an alarm in response to shaking my phone. You could allow users to select how long to snooze the alarm in the settings menu.
I've used other apps that do this, Nudnik was my favorite.