Running around trying to keep everyone topped off on ammo is quite an exciting and stressful time management puzzle, especially when zombies start to stack up around the perimeter. I think the game could benefit a lot from some simple quality-of-life improvements like explanations about what the different items do, a bit of polish to the movement, etc. Also, for a game which is all about running around and making deliveries, it would be fun if there was some cool risk-reward mechanics – like suppose you could carry multiple items at once, but it slows down your character because they’re carrying so much weight. This could add another layer of decision making to the game.
Good job!