Very challenging but definitely worth it! I had a lot of fun playing too ^^ Didn't stop 'til i got 'em all. The secret was one of the first things i noticed but i had so much trouble getting to it because i couldn't actually do the scavenger hunt. I probably typed something wrong though if everyone else could do it, idk.
The jumps-scares got me good and reminded me this is indeed a horror game but that first one omg- :')
I'd say my favorite thing is at one point the speakers are gone from the lobby and yet the lobby music got louder, like if its in your head. Im still curious about the bathroom since you can peek a little in it but im going to assume its nothing but space..