I really liked the story! I got invested in Annah's outcome, as well as Brooklyn's decision. The "play the alternate ending" option was a really nice touch! I also liked the "Advice" blog posts that were sprinkled throughout the story - they did a good job of building up Brooklyn as a character and seeing her blog thoughts.
The background images were good at conveying the story, and I also liked the text switch to "How (Not) to Live Through a Horror Movie" in one of the endings.
I think having some sort of background sound or music would have really elevated the experience - something, perhaps, to add a sense of dread or foreboding.
This is also my first time seeing a Renpy game playable in the browser, so that was an interesting touch! However, I did find clicking to be very unresponsive - not sure if that's due to Renpy, issues with my connection, or what.
Overall, though - great job!