The action doesn't end when the defender intercepts the ball. Many times the defender will fumble the ball. At times it seems like you are playing pinball. The most turnovers on one individual play I have experienced were four. There was one interception and then three fumbles.
Defense can be really fun.
Since there are no penalties, pass interference is allowed. The QB cannot throw a pass to a receiver that is on the ground. The offensive AI also shows its deficiencies. The offense will do the same thing against the same defense over and over again no matter how many times you run the play. There is one defensive play that sends two or three players from the right hand side.