Changed sound emitter to be an entity (instead of looping through all players on server, sound will now play in each player's network bubble)
Made zombies orientate themselves towards the door (experimental - not perfect, but seems to work ok. Can be disabled in new JSON config)
Added more config options to the JSON file (door check timer, door hit timer, whether or not to allow zombies to orientate towards the door)

I recommend leaving the door check and hit timers as their default values, but if you do adjust them, I would recommend only higher values as anything less than the default parameters can make the zombies lose sync with the door hit sounds and animations and it looks pretty weird).

Latest source code is on my github (zenarchist.io)

Meta file update.