Tutorial as soon as you start the game with the simple commands that are in F1 ex: "Click on F1 for more commands". If there is no stamina for a button to run automatic (I believe that even if there is stamina the "automatic run" is great)
Creation of items: find wood on the ground, rope, stone etc to create ax to pick up woods and make safe place and survive the night, make torches for the night.
Simplify the craft, to catch the ax quickly or an iten preset in the buttons numbers above the textual
Night is dark okay, but it's dark enough to the point that you can not see anything, enabling this will help a lot, later being able just torches.
Status of the character in some place of hers (thirst, hunger, stamina, bleeding etc). When the character dies the respawn is not so far away that the player has the ability to fetch his items, but since he has a dead body, the zombie respawn next to it increases a bit to become more dynamic and difficult (and because not by an animation of a zombie eating the body? :D )
Bussola (NSWE) with numbers, divide by km on the map, no location items (game start) by an approximate margin where possibly the character is so easy to go somewhere that maybe has items and / or meet friends , create a system that you should find something that gives to create a GPS maybe to have the most accurate location.
The zombies: Do not listen to them just running screams, I got scared when it suddenly appeared and died haha, zombies dropar you to craft, like clothes, ribbons to make bandages or drop bandages (to stop bleeding for example, you can chance to drop as you please)
More constructions: camps, wooden houses of former residents (some looking like they were destroyed by zombies).
audio settings ( music ex )