local PlayerGui = game:GetService("Players").LocalPlayer:WaitForChild("PlayerGui")

-- Force the game to use Portrait orientation
PlayerGui.ScreenOrientation = Enum.ScreenOrientation.Portrait

-- Optional: If the game tries to change it back, this loop will keep it locked
task.spawn(function()
    while task.wait(5) do
        if PlayerGui.ScreenOrientation ~= Enum.Orientation.Portrait then
            PlayerGui.ScreenOrientation = Enum.Orientation.Portrait
        end
    end
end)