Remember that video game from 1979? The Space invaders would march, march, march down toward the ground and you had to fire at them and get them before they arrived. And they shot back, too!
Mobile center Pawns are like that. If your opponent gets a mobile Pawn center, it must be stopped. If you can get a mobile Pawn center, keep it moving. Sometimes you have to burn material to keep it going. In this game I offered my Queen, just to keep the Pawns moving. Be sure to use the "Move List" button to see the annotations, because some of the best lines were never played.