I found a strange bug. You can get out of circle when you start the game if you are behind a building or (very hard) tree. If the guy starts walking you will be pressed on the building or tree and you will pop out of the circle if you did it correctly. You cant do much because after some time it will make you reset and choose your character (because that is what happens. The guy walks around the fence and tells you to join when ready.) There is enough time to go into the cave but you will get the bat and the gun and everything is normal. Its just a way to skip the tutorial even though you can select that option when you get to it (but it is faster to do the glitch than to wait to have to skip the tutorial). If you have no ammo but you try to shoot, zombies will still get attracted to you. In the tutorial there are stumps that bottle will be placed on so you can shoot them when you receive the game. You can break the stumps and the bottle wills be floating. You cant move spike if you are touching the ends. You have to be on the sides to move them. The tree stump looks strange if a part of it is on the grass and another is on the road:
You should make it that it takes more than one hit to get metal from a car. Make it so when you are selecting slots, add the ability to copy them. In the tutorial the save option is darkened and you cant save. But you can select it. Make it so that it will be skipped when going up/down the menu. When you add it to steam, make achievements. ex Upgraded a base, Saved a person, got orbs. You can die in the tutorial without penalty. Make a hidden achievement for dieing in the tutorial (either once or multiple times).