public void ResetPowerups()
    {
        if (powerupTimers.Count > 0)
        {
            // loop through and undo the powerups
            for (int i = 0; i < powerupTimers.Count;)
            {
                PowerupTimer timer = powerupTimers[i];

                switch (timer.GetPower())
                {
                case Powerup.PowerupType.DoublePoints:
                    scoreManager.MultiplyScoreMultiplier(0.5f);
                    break;

                case Powerup.PowerupType.SafeMode:
                    safeMode = false;
                    break;

                default:
                    break;
                }
            }
            //powerupTimers.Clear();
        }
    }
    // Run all powerup timers down
    void Update()
    {
        if (powerupTimers.Count > 0)
        {
            for (int i = 0; i < powerupTimers.Count;)
            {
                PowerupTimer timer = powerupTimers[i];

                timer.SetTimer(timer.GetTimer() - Time.deltaTime);
                if (timer.GetTimer() <= 0)
                {
                    powerupTimers.Remove(timer);
                    DeactivatePowerup(timer.GetPower());
                }
                else
                {
                    i += 1;
                }
            }
        }
    }