I thought that I could also show my little project at the time, after reading trough all the 67 pages of this thread. It's very early WIP, in fact I just started working on it during this night. Yet it is already a little bit of fun, to kill the ugly placeholder-zombies.
As you can see I have a flashlight. It has simple dynamic lightning via light-element and shadow-tracer.
You can also shoot with your never-ending ammunition supply at the mindless (un)dead and watch their blood splatter around. This will of course be extended with various different blood-stains that will be randomly put on the ground on each hit via animation-frames... after all, what would a zombie game be without gore?
I plan for it to be a strategic horror-survival game where there is no real chance of killing all zombies, rather you have to get to certain points of interest, resupply, find shelter etc. Just survive. The flashlight will partly be your only way to see and there will be always too much zombies to just shoot your way trough.