MY OWN FLY GUI

local ScreenGui = Instance.new("ScreenGui", game:GetService("CoreGui"))
local FlyBtn = Instance.new("TextButton", ScreenGui)
local UICorner = Instance.new("UICorner", FlyBtn)

-- GUI Setup
FlyBtn.Name = "CodexFlyButton"
FlyBtn.Size = UDim2.new(0, 90, 0, 45)
FlyBtn.Position = UDim2.new(0.05, 0, 0.45, 0)
FlyBtn.Text = "FLY: OFF"
FlyBtn.Draggable = true 
FlyBtn.BackgroundColor3 = Color3.fromRGB(35, 35, 35)
FlyBtn.TextColor3 = Color3.fromRGB(255, 255, 255)
FlyBtn.Font = Enum.Font.SourceSansBold
FlyBtn.TextSize = 16
UICorner.CornerRadius = UDim.new(0, 8)

local plr = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local flying = false
local speed = 70 

local function startFly()
    local char = plr.Character
    if not char then return end
    local root = char:WaitForChild("HumanoidRootPart")
    local hum = char:WaitForChild("Humanoid")
    
    local bv = Instance.new("BodyVelocity", root)
    bv.MaxForce = Vector3.new(1e6, 1e6, 1e6)
    bv.Velocity = Vector3.new(0, 0, 0)
    
    local bg = Instance.new("BodyGyro", root)
    bg.MaxTorque = Vector3.new(1e6, 1e6, 1e6)
    bg.P = 10000
    
    hum:ChangeState(Enum.HumanoidStateType.Swimming)

    task.spawn(function()
        while flying and char and root do
            local moveDir = hum.MoveDirection -- This is your Joystick input