Why won't my 3D main menu go away after being seen once?

Hi. As the title states, I'm trying to make my 3D main menu go away after hitting the play button. When the player respawns the main menu reappears. I've tried to make it set the camera to your player on respawn if you've already clicked it using "var" which you can see. But it won't work. If the player respawns it should set the camera to be locked on the player right? Only the bottom parts starting from "PlayClicker" should matter. I'm not even sure why the camera resets back to the main menu, I never tell it to except for the top.

game:GetService("StarterGui"):SetCore("TopbarEnabled", false)
local var
local MainMenu = game.Workspace.Rooms.MainMenu
local cam = workspace.CurrentCamera
local TweenService = game:GetService("TweenService")
cam.CameraType = Enum.CameraType.Scriptable
local player = game:GetService("Players").LocalPlayer
local pgui = player.PlayerGui
local gui = pgui:WaitForChild("FadeBlack")
cam.CFrame = workspace.Rooms.MainMenu.LobbyCameraPart.CFrame
repeat wait() until game:IsLoaded()
wait(1.3)
workspace.MainMenu:Play()
TweenService:Create(workspace.MainMenu, TweenInfo.new(1.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0), {Volume = 0.5}):Play()
local HelpClicker = MainMenu.HelpButton.ClickDetector
HelpClicker.MouseClick:Connect(function()
    TweenService:Create(cam, TweenInfo.new(2.5, Enum.EasingStyle.Quad, Enum.EasingDirection.Out), {CFrame = MainMenu.HelpCameraPart.CFrame}):Play()
end)
local BackHelpClicker = MainMenu.BackHelp.ClickDetector
BackHelpClicker.MouseClick:Connect(function()
    TweenService:Create(cam, TweenInfo.new(2.5, Enum.EasingStyle.Quad, Enum.EasingDirection.Out), {CFrame = MainMenu.LobbyCameraPart.CFrame}):Play()
end)
local PlayClicker = MainMenu.PlayButton.ClickDetector
PlayClicker.MouseClick:Connect(function()
    local var = true
    local tweenInfo = TweenInfo.new(1.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
    TweenService:Create(gui.Frame, tweenInfo, {BackgroundTransparency = 0}):Play()
    TweenService:Create(workspace.MainMenu, TweenInfo.new(1.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0), {Volume = 0}):Play()
    wait(1.5)
    workspace.MainMenu:Stop()
    cam.CameraType = Enum.CameraType.Custom
    cam.CameraSubject = player.Character:WaitForChild("Humanoid")
    player.Character.HumanoidRootPart.CFrame = CFrame.new(Vector3.new(-31.85, 20.5, -119.9))
    game:GetService("StarterGui"):SetCore("TopbarEnabled", true)
    wait(1)
    TweenService:Create(gui.Frame, tweenInfo, {BackgroundTransparency = 1}):Play()
end)
player.CharacterAdded:Connect(function()
    if var then
        cam.CameraType = Enum.CameraType.Custom
        cam.CameraSubject = player.Character:WaitForChild("Humanoid")
        game:GetService("StarterGui"):SetCore("TopbarEnabled", true)
        player.Character.HumanoidRootPart.CFrame = CFrame.new(Vector3.new(-31.85, 20.5, -119.9))
    end
end)