Interesting game, reminds me a lot of surviv.io with the art-style choice and the top-down angle.
Some of the things I have notice that hindered the player experience were:
-Could not shoot at the zombies through the wood(e.g I had to wait for them to break the window to shoot at them)
-I managed to get all the zombies stuck behind objects in the house so I basically became invincible(maybe some more complex AI could help in this case to maybe walk around the objects when they encounter them)
-Generator did not work and did not really understand what I needed it for :(
All in all, good game, it has potential to be quite fun with enough polishing. I would like to maybe see stuff like more weapons or different types of zombies to add a bit more content.
Keep up the good work!