Aside from some bugs, this was really good.
When the bell rang the first time, I think it was chapter 2 or 3, I'm not too sure, the audio for the bell would continue into the scene at Gurley with Oscar and Kevin at the gun store until the zombie noise. It stopped when I scrolled back and would not come back unless you reload before the scene. Also in that scene the images of Brandon Finn and Nev appeared in the top right before fading into where they are supposed to go. There is also a rollback error I encountered, here is what it said:
“game/script.rpy” line 1879, in script
scene huntsvillealley with fade (0.1)
Typeerror: Fade() missing 2 required positional arguments: ‘hold_time’ and ‘in_time’
That's about all the bugs I remember encountering.