For being only a demo, this was absolutely amazing!
The graphics and sound design was also really well done! No issues in that front. The game looks really realistic with its VHS Style.
The only big issue I did encounter was the game crashing at a certain point when it spawns a ton of zombies/monsters. I am assuming this was an entity overload. Restarting the game yielded being able to play fine and no crashing. Although the game did drop frames while the monsters spawned, but no crashing persisted.
Aside from that? This seems very promising so far! Made a video on it.