If you are looking for a Windows Phone game to lose track of time with, check out Lines the Game from Game Troopers. While the game has a casual pace, it is not a pushover by any means.
You are presented with a broad range of drawings and have to determine a strategy to create the longest colored line on that drawing. There are five gaming modes that range from simply placing a colored dot on the drawing to race the other dots already in play to a mode where you add lines to the drawing.
Lines the Game is an easy game to pick up on, a little hard to describe but a great way to pass the time. Available for low-memory Windows Phones, don't be shocked if you start playing and you suddenly realize thirty minutes has passed.
Full story from the WindowsCentral blog...