I enjoyed reading through the module. Nicely done! Your concepts are easy to understand, and the shape of the narrative is easy to grasp for no/low prep. I think my only really gripe is wanting more drama/horror since the system is a horror system, but that's a personal complaint. You can tell any story with any system, and I think you've brought a nice one to life.
Including the opening bit was a nice touch and I can tell that your heart is in the right spot.
Cheers!