When talking to NPC's you cannot shoot zombies etc, maybe change skip text to a button rather than click to allow shooting? After I talked to Kim and skipped through after trying to kill a zombie, it said i could talk to kim (! above head and text saying to press f to talk) but I could not.
Not sure if you realise but you can pick items up through walls, not necesarily a bad thing just not intended I imagine.
Also some reason my first time loading had all the text on the menu buttons but now it does not. (https://imgur.com/a/5NdBxKB)
Im not the biggest fan of the QE to rotate camera and mouse to aim, requires too much brain power for me. I imagine I could get used to it if I played for a long time though, which I am sure I will.
Runs fine on my Surface Pro 4 (i5, 4gb ram)