Roblox scripting,
and the assets to go with it.

-- MenuController

local Players = game:GetService("Players")
local player = Players.LocalPlayer
local MenuController = {}
local menus = {}
local locked = player:GetAttribute("CarriedName") ~= nil

function MenuController.isLocked()
    return locked
end

-- handlers
function MenuController.register(name, handlers)
    menus[name] = handlers
    if handlers.setLocked then
        handlers.setLocked(locked)
    end
end

function MenuController.opened(name)
    for otherName, handlers in pairs(menus) do
        if otherName ~= name and handlers.close then
            handlers.close()
        end
    end
end

local function refreshLock()
    local value = player:GetAttribute("CarriedName") ~= nil
    if value == locked then return end
    locked = value
    for _, handlers in pairs(menus) do
        if handlers.setLocked then
            handlers.setLocked(locked)
        end
    end
end

player:GetAttributeChangedSignal("CarriedName"):Connect(refreshLock)

return MenuController