Fascinating concept!
Since I played this when I was kinda tired, I completely brain-farted originally, and misunderstood my goal (I thought that I was supposed to kill the player, since that seemed like the obvious goal as someone controlling zombies), but once I actually remembered what the intro said, I enjoyed the kind of "puzzle maze" aspect of leading the player via zombie breadcrumbs.
The visual setup is something that I found interesting, (seeing what the player saw, and the ability to see from the Zombie perspective), but while playing I didn't really see any point to that. I think that if you wanted to give that part some kind of use, then maybe things could be hidden under stuff, so that the First Person views would show you shortcuts / upgrades / collectables, while the Top Down view wouldn't be able to see them normally. That aside, I do think that the additional views are probably interesting for viewers to watch when someone else is playing; but if that's the only benefit then I would suggest making them not the default views.
Anyway, really cool idea, and I hope you do well in future updates or games!