Well, the game is kinda... below mediocre; like I don't mean from art or mechanics side; but the gameplay as an overall, the game doesn't stand out, nothing special to make it more fun than any other hold-out games, the zombies don't drop anything; being stuck with one weapon make you get bored so quick, the zombies don't get any more special the more you progress, changing the lives to weapons... like man you just changed an icon, don't take my words as "this game is bad", because as I said "it's just below mediocre" because of how empty the game from new ideas.
-best of luck.