Baldi can hear very well what you are doing or going to do. So, try to find the notebooks in the school classrooms without attracting much attention to your moves across the floors. The school is covered with a mysterious fog and the floors may be flooded. Try to check how many notebooks you can collect. Or you may opt for a Challenge mode with a quite different scenario and try to defeat the monster at high speeds. The number of difficulty levels will allow you to choose what you really want and overcome all the random events you may face.