My script to change button visibility is not working ?

Well it is so, To a home screen, when and clicked to start this frame is visible = false, hence I try that after this frame becomes false appears the button to teleport to the map, but I am not getting

script.Parent.MouseButton1Click:connect(function()
	if game.StarterGui.BackGroundGUI.Frame.Visible == false then
		script.Parent.Visible = true
	end
 game.Players.LocalPlayer.character.LowerTorso.CFrame = CFrame.new(workspace.Point.Position)
 script.Parent.Visible = false
end)

OBS : If I was in doubt in this game https://www.roblox.com/games/1504622981/Up-Power-Coming-Soon

You're changing the Visibility of the StarterGui.

You need to change the Visibility of the BackGroundGUI of the player like so:

local player = game.Players.LocalPlayer
script.Parent.MouseButton1Click:connect(function()
    if player.PlayerGui.BackGroundGUI.Frame.Visible == false then
        script.Parent.Visible = true
    end
 player.character.LowerTorso.CFrame = CFrame.new(workspace.Point.Position)
 script.Parent.Visible = false
end)