This script only works once, although it should be working more than once?

This script basically places the 'TeleportGUI' in the player when they touch the block, as long as they dont already have one in them. This always works the first time around, but never again. Is there a flaw?

local debounce = false



function getPlayer(humanoid) 

    local players = game.Players:children() 

    for i = 1, #players do 

    if players[i].Character.Humanoid == humanoid then return players[i] end 

end 

    return nil 

end 



function onTouch(part) 



    local human = part.Parent:findFirstChild("Humanoid") 

    if (human ~= nil) and debounce == false then



    debounce = true



    local player = getPlayer(human) 



    if (player == nil) then return end 



    user = game.Players:findFirstChild(human.Parent.Name)

    if not player.PlayerGui:FindFirstChild("TeleportGUI") then
        script.Parent.TeleportGUI:clone().Parent = player.PlayerGui
end






    wait(2)

    else

    wait(2)

    debounce = false

end

end

Also, the TeleportGUI gets destroyed after the player uses it. Heres the script in the TeleportGUI

function Click()

local Player = game:GetService("Players").LocalPlayer

local Character = Player.Character

local HRP = Character.HumanoidRootPart


HRP.CFrame = CFrame.new(workspace.forestbrick.Position)

Player.leaderstats.Attempts.Value = 0

script.Parent.Parent.Parent:Destroy()

end

script.Parent.MouseButton1Down:connect(Click)