private void checkEarning() {
    if (cb.isCanCreateMeoMeo()) {
      pp.addMeoMeo();
      cb.setCanCreateMeoMeo(false);
    }
    if (cb.isCanUpgradeMeoMeo()) {
      pp.upgradeMeoMeo();
      cb.setCanUpgradeMeoMeo(false);
    }
  }