The clock below the minimap does flash one hour before you pass out, but I think it's kind of a poor way to notify the player. It was one of the last-minute additions, so I plan on changing it to be much more noticable. The same goes for the delivery timer; currently there is no way for the player to know how much time is left to deliver a package, I'll add that after the jam, as well.
Thank you for playing and for the feedback!