Ammo is too easy to acquire.
I suggest making the piles exhaustable so you're eventually forced to delve deeper into hazardous territory: like the warehouse piles contain 20 items before they disappear and you can't successfuly rummage the same pile within 5 or so minutes.
The most difficult outskirts would have piles so thick that it would take an enourmous amount of time to exhaust them while the nearby piles, like the warehouses, would be exhausted more quickly.
I also suggest taking some time to rummage through a pile; and perhaps a Skill can increase the speed of rummaging.
This would be much more exciting in the case that zombies would roam and respawn more often: trickling unpredictably from more spawn points and definitely roaming.
Perhaps some items can be plucked on the fly, but those should be rare and exhausted immediately (like ammo, medicine, or other higher grade components).
I suggest making the ammo spawn at the crafting table something that can be turned off: definitely seems like a cheat as it trivializes the game: same with the dodgy little fuckers repeatable.
The backpack is bugged somehow.
Sometimes I get infinite backpack space or some items aren't counted as occupying space.
And that little poncho seems a bit unrealistic.
Combat feels good except for melee.
The enemies need a bit of refined Tera style tells and animations.
Some attacks are instant pokes while others are swings and it all feels off, weird, and annoying.
Once you figure out how to time melee attacks, you permastun opponents in 1v1.
Movement should allow for stepping or dodging backwards.
This game is very good, though.
It's fun to play.
I heavily recommend styling the game for replayability.
The whole idea is to live in a zombie apocalypse.
There should be more zombies, they should roam more, and their locations, types and numbers should be less predictable.
The excitement comes from them always possibly being around the corner while collecting supplies and clearing areas.
More spawn points and them spawning away from the MC and roaming would be very nice.
As for the sex animations: for them to look like convincing 'surprise sex', the zombies need to pin her much harder.
I'd also like to see a different stock face if possible.
I think the slider for it is broken or there is no variation currently.
I don't like the MC's personality and I don't like that she's a "Ghoul", but okay.
Protip:
Skin Colour: Green/0.4 to minimize both orange and pasty if you want her to be White.
I'm going to reiterate, though, that this is a fun game.
It's got considerable potential.