public void UpgradeFirePower() { if (prefsControl.GetCurrentGameMoney() >= FIRE_POWER) { prefsControl.SetFirePower(prefsControl.GetFirePower() + 1); prefsControl.SetCurrentGameMoney(prefsControl.GetCurrentGameMoney() - FIRE_POWER); CalculateLevel(); } else { error.gameObject.SetActive(true); } }