High score of 508 636. Shotgun is powerful.
That out of the way, this is definitely a fun timewaster. Pretty polished, hunger and ammo discourage hiding in a house, and the vision/shooting system is very cool (it's so simple compared to what you'd expect from a top-down shooter, but also adds a layer of realism that surprised me when I figured that out). The unconditional spawning of zombies behind you also presents an interesting challenge.
My one critique is to buff the flamethrower. Despite having its own ammo, it's weak compared to the pistol and, at times, even the fists. It can burn through ammo (which alone justifies its own ammo category) for a delayed kill. In the early game, punching is a better alternative. In the late game, you're not gonna last long without a shotgun, and the flamethrower doesn't help with clearing paths to find one nearly as much as the AR or pistol. I'd suggest speeding up the burn time, slowing down the ammo consumption (make 1 fuel last a second, then consume another), and/or doing what most games do and making it pierce.