There is also some sort of permanent event as of 0.7.0a unless that was also in other versions.
When you go to the school area, you'll find some triggers that shows numbers, especially the number 4 when you get close to the student cap effect, when you pinch your cheek and go back to sleep so you can come in your dream bedroom, four '4's will appear on the wall and will remain there for the rest of the game.
A '5' also appeared in the dream bedroom when I picked up an extra effect but i'm not too sure if that was the trigger, I'll do more exploring at a later time..