I tried messing with it today but I SUCK at forge. I don't see how you people have the patience for it. Manipulation of a single object is a chore.
Basically Il Duce's game needs player damage turned off, a way to keep warthogs from getting into the goals and subsequently getting stuck in teh grav lift, and a scoring mechanism.
The best ways I have seen are the one mentioned earlier where either the grav lift sends the ball up in the air to knock over an obstacle blocking the reciever teleporter to the scoring teams bomb. Either that or the soccer ball blocks the reciever node itself, thus allowing you to walk through a nearby teleporter without it teleporting you. The bomb is behind the sender node and you couldnt get through it before because it would port you.
The other way I have seen is that the ball goes into the goal and falls into a pit on top of and blocking a teleporter. You now walk over the ball to get to your bomb. Previously, if you tried to go in there, the teleporter would just send u back to the middle. Of course, player gravity has to be turned up so u can't jump the teleporter.