Can anyone tell me why this datastore script I found doesn't save?

found this youtube video on datastores and wanted to try it out but for some reason it doesnt load in the level value(and it wont display the level value either)

local DataStoreService = game:GetService("DataStoreService")

local LevelSave = DataStoreService:GetDataStore("PLevel")

local LevelLable = game.StarterGui.TopLeftGui.LevelGui.LevelLabel

game.Players.PlayerAdded:Connect(function(plr)

local Level = Instance.new("IntValue")

    Level.Name = "Level"
    Level.Parent = plr 
    LevelLable.Text = "Level:"..Level.Value
    local success, errormessage = pcall(function()
        LevelSave:GetAsync(plr.UserId, plr.Level.Value)
    end)
    if success then
        print("cool")
    else
        print("there was an error whilst printing your data")
        warn(errormessage)

    end
end)

game.Players.PlayerRemoving:Connect(function(plr)
  local success, errormessage = pcall(function()
LevelSave:SetAsync(plr.UserId, plr.Level.Value)
        end)
    if success  then
        print("yes")
    else
        print("no")
        warn(errormessage)
end
end)