code: def update(self, dt):
          
          for key, value in self.labels.iteritems():
              str_val = str(int(self.stats[key]))
              self.msgs[key][0].element.text = self.labels[key] + str_val
              self.msgs[key][1].element.text = self.labels[key] + str_val
docs: Responsabilities:
              Updates game engine each tick
              Copies new stats into labels