private int getLevel() {
		
		int   level = 0;
		float y     = 0;
		
		if(invader1.getEntityCount() > 0)      {y = getLowestInvader(invader1);}
		else if(invader2.getEntityCount() > 0) {y = getLowestInvader(invader2);}
		else if(invader3.getEntityCount() > 0) {y = getLowestInvader(invader3);}
		else                                   {endGame(0);}
		
		level = (int) y/32;
		return level;
		
	}