Had a nice time playing this!
First, it is really cool that you used Godot. I always love seeing game developers use free and open-source engines. Also, a huge thank you for uploading a Linux build! As a Linux user, I really appreciate it.
I think there were some missed opportunities for scares. It would have been awesome to see the lurker peeking from a window, standing in the hallway, showing up on a TV screen, or even clinging to the ceiling above the player!
I only lost once. Once I figured out the gameplay, it got pretty easy. To win, I basically had to act like a "human radar" while charging my flashlight at set intervals (though I'm not sure if that was how you intended us to play it!).
Overall, I had a good time with the game. Keep it up!