Indoor football has a lot of rules. It is well a thought out and organized league. The rules were thought out, for a smaller playing space then the NFL. The field is only 50 yards, half the size of a regulation NFL field. When the teams take the field there are only 8 players per side. Substituting on either side of the ball is allowed.
The indoor league plays four quarters of 15 minutes each. There is a 15 to 20 minute half time. As with the NFL, the offensive team has four downs to make ten yards.I found some more information here. One big difference is that in indoor football the defense can only blitz one person.
In the indoor football game there are two additional ways that you can score points. You can score four points fo a drop kick field goal. You can also score one point for a rouge-kickoff downed in the end zone. The rules and scoring may be different for this game but it leads to a good game to see. Many times the teams will do a lot of scoring. So if you like offense, this is a good game for you to see. Get your seats now and you will not be disappointed.