FOV Slider With Key System

-- FOV Slider GUI for Roblox with Key System
-- Key: fovisbetter

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local TweenService = game:GetService("TweenService")

local player = Players.LocalPlayer
local Camera = workspace.CurrentCamera

-- Create ScreenGui
local screenGui = Instance.new("ScreenGui")
screenGui.Name = "FOVSliderGui"
screenGui.ResetOnSpawn = false
screenGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

local success = pcall(function()
    screenGui.Parent = game:GetService("CoreGui")
end)
if not success then
    screenGui.Parent = player:WaitForChild("PlayerGui")
end

-- Key System
local CORRECT_KEY = "fovisbetter"

-- Create Key System Frame
local function createKeySystem()
    local keyFrame = Instance.new("Frame")
    keyFrame.Name = "KeyFrame"
    keyFrame.Size = UDim2.new(0, 350, 0, 200)
    keyFrame.Position = UDim2.new(0.5, -175, 0.5, -100)
    keyFrame.BackgroundColor3 = Color3.fromRGB(18, 18, 22)
    keyFrame.BorderSizePixel = 0
    keyFrame.ZIndex = 10
    keyFrame.Parent = screenGui

    local keyFrameCorner = Instance.new("UICorner")
    keyFrameCorner.CornerRadius = UDim.new(0, 12)