...And I still don't understand how it reacts to how we play. Aren't the attacks random events?

I don't get it either.

What I think I figured out is:
1. I feel like the more often you die the easier the game gets.
2. The candles seem to disable events in rooms where you place them.
3. the haikus and stuff like have zero use(?)
4. the requiem event is impossible or you have to increse the gamma to max
5. the more often you have to do an event with a character in a level the harder it gets(?)
6. stethoscope randomly BUGGED in level 5 making it unwinable 50% of the time
7. after an event happened there is a pause until the next event
8. running causes more events after a while I think. Not sure... sometimes I make more progress running sometimes I do more when walking, it's really weird and random...

9. one thing I forgot to mention is the clocks on the wall. They show different times over time. I suspect this to be a difficulty meter. But I could be wrong. Like when you start a level it's starts at the clocktime it is like 1 o clock. And I feel like running progresses the time on the clock faster. But this needs more observation to figure out if it's true.

I was wrong, events do happen in rooms where you lit candles. I guess the candles either do nothing or just lower the chance of an event.

It seems the candles make your character calm down faster. The haikus are like hints of what you'll encounter but most of the time I didn't get it until I got wayyyy past that point.