I'm working on a game that involves DataStore. My code works in studio, and the stats save even when I join an actual server but won't update further once in game. (the moves wont add exp when they should)

local exp = game:GetService("DataStoreService"):GetDataStore("exp") 
local lvl = game:GetService("DataStoreService"):GetDataStore("level") 

function updateExp(value)
	value = game.StarterGui.IntValues.exp.Value
end

function updateLevel(value)
	value = game.StarterGui.IntValues.level.Value
end
 
game.Players.PlayerAdded:connect(function(Player)
    	local PlayerKey = "user_" .. Player.userId
 
    	local leaderstats = Instance.new("IntValue", Player)
    	leaderstats.Name = "leaderstats"
 
    	local experience = Instance.new("IntValue", leaderstats)
    	experience.Name = "Experience Points"
    	experience.Value = exp:GetAsync(PlayerKey) or 0

	local level = Instance.new("IntValue", leaderstats)
    	level.Name = "Level"
    	level.Value = lvl:GetAsync(PlayerKey) or 0

	game.StarterGui.IntValues.exp.Value = experience.Value
	game.StarterGui.IntValues.level.Value = level.Value
	
	local plr = game.Players.LocalPlayer
	plr.Character.Humanoid.MaxHealth = game.StarterGui.IntValues.level.Value*10+100
	plr.Character.Humanoid.Health = plr.Character.Humanoid.MaxHealth

	spawn(function() while wait() do
		if plr.Character.Humanoid.Health < plr.Character.Humanoid.MaxHealth then
			plr.Character.Humanoid.Health = plr.Character.Humanoid.Health + .01
		end
	end end)

	spawn(function() 
		game.StarterGui.IntValues.exp:GetPropertyChangedSignal("Value"):connect(function()
			exp:UpdateAsync(PlayerKey, updateExp)
			experience.Value = game.StarterGui.IntValues.exp.Value
			lvl:UpdateAsync(PlayerKey, updateLevel)
			level.Value = game.StarterGui.IntValues.level.Value
			wait()
		end)
	end)
end)
Anonymous