public void init(byte player_mode){
		players = new Player[2];
		boolean hasP1 = (player_mode & PLAYER_MODE_P1_ONLY)==PLAYER_MODE_P1_ONLY;
		boolean hasP2 = (player_mode & PLAYER_MODE_P2_ONLY)==PLAYER_MODE_P2_ONLY;
		if (hasP1) players[PLAYER_ID_P1] = new Player(PLAYER_ID_P1);
		if (hasP2) players[PLAYER_ID_P2] = new Player(PLAYER_ID_P2);
		stageId = 1;
		CityMap cmap = new CityMap(stageId);
		curStage = new Stage(this);
		curStage.loadCityMap(cmap);
		
		startStage();
	}