Only played the first game that's a tutorial & uninstalled. The timer starts at 1m59s & when that quickly runs out you have to watch an ad to get another 60 seconds of time. I did 3, 60 second extensions & still had 2 unfound items. It's difficult searching for differences with such small viewing area's even though can use pinch-to-zoom. There's wasted white space that should be used to make the viewing area's larger. Plus there's an ad banner at the bottom of the screen!