Set the Day of the week for tomorrow, and the time you want to be up by (I add a half hour). Then if you're not awake to move the alarm to the next day on time, it'll add a datapoint to a goal on beeminder. Set the goal up to "Do Less" oversleeping.

This Trigger fires only on specific days of the week at the time you provide.

This Action will add a new datapoint to a Beeminder goal.

Wake up on time and move the timer, or get stung on Beeminder.