Philly Scavenger Hunt

This weekend I am going to do a scavenger hunt in Philly with my brother. It's called the Big Hunt, and basically you use an app that gives you clues, and you have to walk to the certain destinations to get the next hint. They say you have 2 hours, but the whole point is to do it as quickly as possible. I am kind of nervous that I won't be that good at it, but my brother tends to be good at that stuff.