private void clearReleasedPowerups()
	{
		int index = 0;
		boolean releasedPowerupsCleared = false;
		
		while(!releasedPowerupsCleared)
		{
			releasedPowerupsCleared = true;
			
			for(int i = index; i < powerups.size(); i++)
			{
				if(powerups.get(i).isReleased())
				{
					powerups.remove(i);
					index = i;
					releasedPowerupsCleared = false;
					break;
				}
			}
		}
	}