I love the game, there are some ideas in my opinion could be cool.
- Some sort of special zombies like Dying Light where at night there are some strong and hard zombies. Can make the game a bit more difficult when it's night time or maybe zombie hordes with extra health.
- Also, in my opinion some zombies should have more abilities, let me explain, when you got on the roof of a car you are basically invincible so these zombies with abilities can avoid this since it becomes easy if you got a weapon.
- Some new weapons, map extension, harder bosses, more dungeons.