def update(self, dt):
        """
        Responsabilities:
            Updates game engine each tick
            Copies new stats into labels
        """
        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