Watching the movie felt almost exactly like how it feels to play the games imo. Almost every line Bryan said throughout the movie was something I've said myself while playing. Trying to shoot padlocks, missing tons of pistol shots, knowing a zombie is coming and still screaming when it does...so many similar experiences. As for the plot, you hardly ever get direct continuation between games, and new lead characters are introduced all the time, so to me this easily felt like it fit in the world established by the games.
Definitely felt like it was made by a fan which I think is the most important thing in adaptations.