After playing a while I like the concept of a FPS with some tactics and a big map to explore. I understand that is a prototype and you need to keep working so I will keep an eye on the progression!.
Surely I will recommend it to some friends, in the other hand I like the idea of controlling an army but I miss some progression in the soldiers, and also more enemies, like a fast enemy....
About the hordes I will like to see them more disperse instead of coming in a line, not sure how you can solve it, but I think it will feel much more interesting if the zombies comes from everywhere!
Keep working, this looks pretty nice!