i might seem like someone who expects alot but im just giving suggestions =D anyway in addition to my previous comment you should add different TYPES of guns!(sniper rifles,dual pistols,shotguns) and also be able to buy better scopes and also make more maps.be able to customise characters.oh and add oxygen tanks and perks. oxygen tanks to survive longer underwater,and add a health bar/heath monitor. add an oxygen monitor and make a boundary so we cant die from going too far.
add fall damage! its abit scary when your wlaking around and someone jumps out of nowhere and nades you and he doesnt get any damage... anyway nice game 5/5 for beta! and you should add more guns too. more stuff like being able to buy gun skins or character skins with money and you get money when you kill and stuff.