public void updateGameState() {
    if ((! isDebug) && PlayLoop.gameSpeed() < 1) {
      Power.applyTimeDilation(PlayLoop.gameSpeed(), this) ;
    }
    if ((! isDebug) && PlayLoop.gameSpeed() > 1) {
      Power.applyResting(PlayLoop.gameSpeed(), this) ;
    }
    world.updateWorld() ;
  }