Great work here
Please make a sequel!
I quite enjoyed this game but found it somewhat short and a bit easy I mean I actually finished it!
But anywho nice choice of weapons
I would of prefered a few more and to add a supplies component.
e.g. your surivors need to find food, water and ammo.
So maybe they could search for rations and ammo during the day and if they run out of ammo for a certain weapon they have to use a different weapon or maybe even have to resort to melee.
Then again that changes the game significantly so you might not want to go that path.
I would of liked to see minigames where you search for the survivors/weapons or maybe slightly more control over that e.g. send to a certain area/distance/risk
Please make a sequel this is a really good game concept you have.