So, you pick 3 plays at a time (if it's first down) and you can choose from 9 plays (run left, right, middle...pass right, left, middle and pass deep left, r, m...etc.). So, you pick those three plays and send them off to your friend, but before you send them off, you do a quick skill game for each play to determine how hard it will be for your friend to defend against your plays.
The skill games are kind of similar to a few skill games in other games like New Star Soccer or 9 innings. For running plays, you see a view from behind the offensive line and you are trying to "hit the hole" at the precise time. There are little, transparent, moving circles that get bigger and smaller as they move through the offensive line. They turn green when the hole is open (you'll see a gap in the line too). The idea is to tap the circle when it's as small as possible and as green as possible. There will be a huge variation in the circles each time you do the game (speed, number of circles, direction of circles) and it's kind of similar to the pitching mechanic in 9 innings.
For passing plays, it's kind of a top down (or isometric-ish) view and you are the QB standing behind the line. You see your WRs running routes and you pull back, aim and pass the ball and try to time the route to hit one of your WRs in stride. You have to do this before the Defense crashes through the line. For deep passes, you do the same passing skill game, but it's more difficult and further away, but you also do an additional skill game where you have to time and do a pinch motion to catch the ball coming at you.
So, then, you've sent your plays off to your friend. Your friend then tries to guess which plays you picked (kind of like Tecmo Bowl) and selects three plays (same ones as on offense). It then shows your friend which plays you picked and how they compare to what they picked. If they guess correctly, then that particular defense skill game will be easier, but if they guessed way off (they pick pass deep left and you picked run right) then their skill game will be extra hard.
Defending the run is the same skill game as the offense run skill game, basically.
Defending the pass is a skill game where the CB is following the WR stride for stride. At changes in the WR's route, you will be asked to do a gesture (swipe, tap, pinch, etc) quickly. If you do the wrong one, or if you are too slow, you will begin to lose stride with the WR. There will be kind of a big, transparent circle that is a kind of a zone you are trying to stay within for following the WR. If you are outside of the zone when the ball is thrown, then you won't be able to defend the pass (they could still drop it, if the throw was ****ty by the guy on offense). If you are in the zone, you will get a similar skill game as the deep pass where you either pinch the ball to go for the pick (risky) or you just try and tap the ball for a swat (safer).
After each skill game on defense, you see how many yards you've allowed per play. The results go back to the guy on offense, and if it's a first down, then he picks three new plays and continues on. If it's now 4th down, he can choose to go for it, punt of kick a FG. The FG skill game is like new star soccer-ish. The punt one is a little like new star soccer, but you control the power of the punt instead of picking where on the ball to kick it.
So yeah, that was probably a horrible job of explaining this ****. We will have to show you on a lot of these. Believe me, it makes sense.
On top of all of this, you can have a **** ton of games going at once (like words with friends) and, it's free and ad supported. There will be FB and Twitter integration, so you can easily invite friends.
The pay version (probably $0.99) will have the ability to create custom teams (logo, name and color) create full on leagues and you will get to play all of the skill games as separate "arcade mode" challenges with leaderboards.
The league system will allow you to create a league and invite as many friends to join. The commissioner will be able to customize divisions and add and boot players as necessary. The game schedule will probably not be week dependent (i.e. you play your games whenever) until you get to the playoffs.
**** that was long.