Well done! Got the first ending.
One thing is that in most of the rooms I took more damage from cacti then zombies, and having the button to talk to people be the same as shoot means I avoided talking to people to avoid shooting them like what happened when I tried to talk to the mute brother the first time.
And the - presumably - bug of infamy and kills on npcs not resetting on room-reload was frustrating, had to restart the game a few times to get around that.