Thank your explanations xD! Unfortunately, it is a bug: After the game restarted for me, and I could not find the key, I figured I could find it in another place, so I did search for it! No where to be found, here the attic was already open from the last playthrough before it restarted, it did not work as intended by your explanations here! I literally had the whole house with nothing inside, no key, no enemy to be found and the attic is open already.
I did not see the instructions for closing the eyes to prevent the character from sleeping but I did figure it by randomly pressing Left Click, I thought it is related to the flashlight because if you watch the video it seems the light faded right as I stepped on that needle on the ground on the stairs!
All in all, it is a nice game! I liked the concept; just not how she (the enemy) is blind to me literally being in front of her many times haha! I know how I did not got spotted there! I hope these comments and feedback is helpful for you to fix those little bugs!