1.增加难度选择，点击开始游戏时，可选择简单或困难，两种难度
2.新增3种异常，所有难度都可以游玩所有异常
1. Add difficulty options. When you click to start the game, you can choose easy or hard
2. Added 3 new exceptions, all of which can be played on all difficulty levels

1. Update the five exceptions, including some detail exceptions to increase the difficulty
2. Optimize some scene ornaments to increase the sense of reality