All the way from Italy, that's awesome! Glad you are enjoying it, and I really appreciate the kind words and the time you put into building this out. Using this to teach me how to build so I can build the other game I have planned that's original.
There are no ammo pickups on the map. Max ammo drops are the only refill, which is intentional and matches Call of Duty Zombies. If you run low, you can also wait for a max ammo drop or try the Mystery Box for a new weapon.