How too disable a frame from appearing after death?

What I would do is something quite simple. Create a bool that basically is set to true once the loading screen is loaded. That bool will prevent the screen from appearing after the player dies. Additionally, I created an if statement that will load the loading screen if loaded == false. If loaded == true, then it should not load the loading screen. Let me know if you have any issues!

local plr = game.Players.LocalPlayer

local char = plr.Character or plr.CharacterAdded:Wait()
char:WaitForChild("HumanoidRootPart").Anchored = true

local mouse = plr:GetMouse()
local loaded = false

local camera = workspace.CurrentCamera

camera.CameraType = Enum.CameraType.Scriptable
camera.CFrame = workspace.MenuComponents.CameraStartPosition.CFrame


local tweenService = game:GetService("TweenService")


local mainMenuGui = script.Parent


local mainMenuBG = mainMenuGui:WaitForChild("MainMenuBackground")

local playBtn = mainMenuBG:WaitForChild("PlayButton")
local creditsBtn = mainMenuBG:WaitForChild("CreditsButton")

local creditsBG = mainMenuBG:WaitForChild("CreditsBackground")


local loadingScreenBG = mainMenuGui:WaitForChild("LoadingScreenBackground")

local logo = loadingScreenBG:WaitForChild("Logo")

local loadingBarBG = loadingScreenBG:WaitForChild("LoadingBarBG")
local clippingFrame = loadingBarBG:WaitForChild("ClippingFrame")
local loadingBar = clippingFrame:WaitForChild("LoadingBar")


if loaded == false then
    clippingFrame.Size = UDim2.new(0, 0, 1, 0)

    clippingFrame:TweenSize(UDim2.new(1, 0, 1, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 5)


    clippingFrame:GetPropertyChangedSignal("Size"):Connect(function()   

        loadingBar.Size = UDim2.new(1/clippingFrame.Size.X.Scale, 0, 1, 0)
    end)


    repeat wait() until clippingFrame.Size == UDim2.new(1, 0, 1, 0)


    local loadingScreenFade = tweenService:Create(loadingScreenBG, TweenInfo.new(3, Enum.EasingStyle.Quint, Enum.EasingDirection.InOut), {BackgroundTransparency = 1})
    loadingScreenFade:Play()

    logo:TweenPosition(UDim2.new(0.5, 0, -0.5, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 2)
    loadingBarBG:TweenPosition(UDim2.new(0.5, 0, 1.5, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 2)

    loaded = true
end

local originalCFrame = camera.CFrame
local scaleFactor = 1000


game:GetService("RunService").RenderStepped:Connect(function()


    local centreOfScreen = Vector2.new(camera.ViewportSize.X / 2, camera.ViewportSize.Y / 2)

    local mouseDistanceFromCentre = Vector3.new((-mouse.X - centreOfScreen.X) / scaleFactor, (mouse.Y - centreOfScreen.Y) / scaleFactor, 0)


    camera.CFrame = originalCFrame * CFrame.new(originalCFrame.LookVector + mouseDistanceFromCentre)
end)


local playButtonClicked = false

playBtn.MouseButton1Click:Connect(function()

    if playButtonClicked then return end
    playButtonClicked = true


    creditsBG:TweenPosition(UDim2.new(-0.5, 0, 0.5, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 1, true)

    mainMenuBG:TweenPosition(UDim2.new(-1, 0, 0, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 3, true)


    wait(3)


    char.HumanoidRootPart.Anchored = false
    game.Players.LocalPlayer.PlayerGui.SelectionGui.Enabled = true
    --char.HumanoidRootPart.CFrame = workspace.MenuComponents.SpawnPart.CFrame



    mainMenuGui.Enabled = false
end)


local creditsOpen = false

creditsBtn.MouseButton1Click:Connect(function()


    if playButtonClicked then return end


    if creditsOpen then
        creditsBG:TweenPosition(UDim2.new(-0.5, 0, 0.5, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 1, true)

    else
        creditsBG:TweenPosition(UDim2.new(0.5, 0, 0.5, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quint, 1, true)
    end

    creditsOpen = not creditsOpen
end)


local function hoverOnButton(btn)

    if playButtonClicked then return end

    local colourDarken = tweenService:Create(btn, TweenInfo.new(0.1, Enum.EasingStyle.Quint, Enum.EasingDirection.InOut), {ImageColor3 = Color3.fromRGB(221, 221, 221)})
    colourDarken:Play()
end

local function hoverOffButton(btn)

    if playButtonClicked then return end

    local colourNormal = tweenService:Create(btn, TweenInfo.new(0.1, Enum.EasingStyle.Quint, Enum.EasingDirection.InOut), {ImageColor3 = Color3.fromRGB(255, 255, 255)})
    colourNormal:Play()
end


playBtn.MouseEnter:Connect(function()

    hoverOnButton(playBtn)
end)
creditsBtn.MouseEnter:Connect(function()

    hoverOnButton(creditsBtn)
end)

playBtn.MouseLeave:Connect(function()

    hoverOffButton(playBtn)
end)
creditsBtn.MouseLeave:Connect(function()

    hoverOffButton(creditsBtn)
end)

Hello. Thank you for the response. Am I supposed too put anything , like a value in the screengui? If not, I replaced the script with yours, and when I reset the loading screen still shows up. I was trying to make it so the loading screen shows up when the player joins, but not after the player dies. I need it so only the main menu to show up after the character dies.