From the website: Big Sunday Football plays closer to real football than any other game. Running, Passing, Kicking, Penalties, Sacks, Interceptions, Fumbles, 2-minute Warning, 2 point conversion, bad call by officials flag picked up. You name it, Big Sunday has it, except audibles. For ages 7-adult. Endorsed by NFL Coaches and Players. When you roll doubles look to the rule chart. You may have broken a tackle or if you sacked the QB doubles means he fumbled the ball. You may have intercepted the pass and three doubles in a row means Touchdown return.