Great game! I had to play it a bunch of times in order to get the first ending so I spent quite a bit of time on this game
Spoilers:
I liked how the game has a lot of hidden mechanics such as being able to use the locket/crucifix to see whether the monster was still chasing you by checking if you could use the item. It was also very scary to see the sudden change in perspective when you hiding in the closet or getting caught by the monster. Some of the items are also very interesting such as the candy which would allow you to quickly sprint through to all the items in the early game so you would have an easier time. Though there were some items that felt kinda useless like the glowstick.
However, after playing the game a few times I got to 8/9 pages but got killed before I could get the final note. This made the game feel a little boring as it eventually became a game of memorization of where all the notes are. Maybe there can be some way of hinting the player where the final few notes are.
I also wished there was some other threat or another monster that would harm me as I find that you would also want to save up your whole sprint bar for the monster. I think making the monster more threatening would also help as you are able to easily run away from it early on.
Overall, it was a good game that made good use of the 2 colour requirement and an interesting vision cone.