Drawing the screens is a blast! I've continues to do so. This particular screen will come when a level is complete. You can see an area for stats, coins, days, a tweet button etc.
In the center of the sign will be a short journal entry about the progression of the play like "day 22: caught a zombie chewing bubble gums the other day". Along with that is the option to tweet that.
Forgot to take a picture when it was only a pencil sketch. You can still see some of the original lines.