Please allow a day time option. It makes no sense to go out to kill zombies at night, and having a hard time seeing. I made a post about this in the past, but hopefully you see this and take into consideration of allowing people to choose whether to go out at night or day.
This game has the same syndrome as necronator 3(at least in necronator you gain levels). You don't gain anything for beating previous levels. You only gain points for beating new levels. This prevents enjoyment. You don't feel like you have improved, because you don't gain anything for failing to beat a level and trying to beat it again and then failing again, you still won't get anything. So to answer this, developers usually allow you to beat former levels to practice OR gain levels or points, which is missing from this game and that is why this game is not as good as it can be.
One single problem, who the hell would go out at NIGHT during a zombie apocalypse to do missions and recon? The darkness is unrealistic, and destroys the mood. The mood is unrealistically scarey at best, but unrealistic is not as good as realistic scarey.
There needs to be a way to reset stats. This has been suggested a couple of times, but hopefully posting this periodically will result in the game's developer seeing this suggestion.
The reason for this is because the game doesn't tell you what are each of the stats, and what each stat does. So in the beginning, we tend to just put it anywhere, which can mess up your stats and mess up the balance of the game, especially if you go overboard in strength, thinking strength=damage.
I wish we can reset our stats but not lose everything we have worked hard for... because to reset your stat, you have to reset your entire account, which is stupid.