Level leaderstat script not working?

So I made this level leaderstat script for my roleplaying game that is supposed to work so that players can level up once they reach a certain value of XP. I used my gold leaderstat script and changed the names and values. The script overwrites my gold script and it doesn't work. Here are all the scripts.

Level leaderstat script:

local save = true 
local datastore = game:GetService("DataStoreService"):GetDataStore("Stats")
local ver = "V0.1"

game.Players.PlayerAdded:connect(function(join)
	
	local stats = Instance.new('IntValue')
	stats.Name = "leaderstats"
	stats.Parent = join
	
	level = Instance.new('IntValue')
	level.Name = "Level"
	level.Parent = stats

	if save == true then
		
		level.Value = datastore:GetAsync("Level"..join.Name) 
	end
end)

game.Players.PlayerRemoving:connect(function(leave)
	if save == true then
		
		datastore:SetAsync("Level"..leave.Name, level.Value)
	end
end)

Gold leaderstat script:

local save = true
local datastore = game:GetService("DataStoreService"):GetDataStore("Stats")
local ver = "V0.1"

game.Players.PlayerAdded:connect(function(join)
	 
	local stats = Instance.new('IntValue')
	stats.Name = "leaderstats"
	stats.Parent = join
	
	cash = Instance.new('IntValue')
	cash.Name = "Gold"
	cash.Parent = stats

	if save == true then
		
		cash.Value = datastore:GetAsync("Gold"..join.Name)
	end
end)

game.Players.PlayerRemoving:connect(function(leave)
	if save == true then
		
		datastore:SetAsync("Gold"..leave.Name, Gold.Value)
	end
end)

Level up script:

local level = Instance.new("IntValue")
level.Name = "Level"
level.Value = 1
function onxpChanged(player, XP, level)
	    if XP.Value>=level.Value * 50 then
	        XP.Value = XP.Value - level.Value * 50
	        level.Value = level.Value + 1
	        local healthincrease = 50
	   end
	end
	 
	function onLevelUp(player, XP, level)
	    if player.Character~=nil then
	        for i = 1,5 do
	            local fireworks = Instance.new("Part")
	            fireworks.Shape = 0
	            fireworks.formFactor = "Symmetric"
	            fireworks.Size = Vector3.new(1,1,1)
	            fireworks.BrickColor = BrickColor.Random()
	            fireworks.CFrame = player.Character.Head.CFrame + Vector3.new(0,2,0)
	            fireworks.Parent = game.Workspace
	            game:GetService("Debris"):AddItem(fireworks, 2)
	            fireworks.Velocity = Vector3.new(math.random(-30,30),math.random(-30,30),math.random(-30,30))
	        end
	    end
	    local m = Instance.new("Hint")
	    m.Parent = game.Workspace
	    m.Text = player.Name .. "Leveled up"
	    wait(3)
	    m.Parent = nil
	end
	 
	function onPlayerRespawned(player)
	    wait(5)
	    player.Character.Humanoid.Health = player.leaderstats.Level * 100
	    player.Character.Humanoid.MaxHealth = player.leaderstats.Level * 100

	end
	 
	function onPlayerEntered(newPlayer)
	    local stats = Instance.new("IntValue")
	    stats.Name = "leaderstats"
	 
	    local xp = Instance.new("IntValue")
	    xp.Name = "XP"
	    xp.Value = 0
	 
	    local level = Instance.new("IntValue")
	    level.Name = "Lvl"
	    level.Value = 1
	 
	    local c = Instance.new("IntValue")
	    c.Name = "Gold"
	    c.Value = 0
	 
	    xp.Parent = stats
	    level.Parent = stats
	    c.Parent = stats
	 
	    stats.Parent = newPlayer
	 
	    xp.Changed:connect(function() onXPChanged(newPlayer, xp, level) end)
	    level.Changed:connect(function() onLevelUp(newPlayer, xp, level) end)
	 
	    newPlayer.Changed:connect(function (property)
	        if (property == "Character") then
	            onPlayerRespawned(newPlayer)
	        end
	    end)
	end
	 
	game.Players.ChildAdded:connect(onPlayerEntered)

XP script:

XP = script.Parent.Parent.Parent.Parent.Parent.leaderstats.XP
level = script.Parent.Parent.Parent.Parent.Parent.leaderstats.Lvl

while true do
script.Parent.Text = "XP: " .. XP.Value .. " / " .. level.Value * 50 
wait(0.1)
end

XP fill bar script:

XP = script.Parent.Parent.Parent.Parent.Parent.leaderstats.XP
level = script.Parent.Parent.Parent.Parent.Parent.leaderstats.lvl

while true do
wait()
local pie = ( XP.Value / (level.Value * 50)) 
script.Parent.Size = UDim2.new( pie , 0 , 0, 20)
end

Enemy Gold and XP on death script:

local Humanoid = script.Parent.Humanoid
function PwntX_X() 
local tag = Humanoid:findFirstChild("creator") 
	if tag ~= nil then 
		if tag.Value ~= nil then 
local Leaderstats = tag.Value:findFirstChild("leaderstats") 
			if Leaderstats ~= nil then 
Leaderstats.Gold.Value = Leaderstats.Gold.Value + 1 
wait(0.1)
script:remove()
			end 
		end 
	end 
end 
Humanoid.Died:connect(PwntX_X) 




local Humanoid = script.Parent.Humanoid 
function PwntX_X() 
local tag = Humanoid:findFirstChild("creator") 
	if tag ~= nil then 
		if tag.Value ~= nil then 
local Leaderstats = tag.Value:findFirstChild("leaderstats") 
			if Leaderstats ~= nil then 
Leaderstats.XP.Value = Leaderstats.XP.Value + 2 
wait(0.1) 
script:remove()
			end 
		end 
	end 
end 
Humanoid.Died:connect(PwntX_X) 

Current Gold GUI script

while true do
script.Parent.Text = "Gold: " .. math.floor(script.Parent.Parent.Parent.Parent.Parent.leaderstats.Gold.Value)
wait(0)
end

Current Level GUI script:

while true do
script.Parent.Text = "Level: " .. math.floor(script.Parent.Parent.Parent.Parent.Parent.leaderstats.Lvl.Value)
wait(0)
end

These are all the related scripts, please tell me my fault. Thanks for reading.