Fly script (FIXED)

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

local player = Players.LocalPlayer

local flying = false
local speed = 65

-- movement state
local move = { forward = false, back = false, left = false, right = false, up = false, down = false }

-- references that will be (re)created per character
local hrp, hum
local bv, bg

local function cleanupBodyMovers()
    if bv and bv.Parent then bv:Destroy() end
    if bg and bg.Parent then bg:Destroy() end
    bv = nil
    bg = nil
end

local function createBodyMovers(parent)
    cleanupBodyMovers()

    bv = Instance.new("BodyVelocity")
    bv.MaxForce = Vector3.new(0,0,0)
    bv.Velocity = Vector3.new(0,0,0)
    bv.P = 1250
    bv.Parent = parent

    bg = Instance.new("BodyGyro")
    bg.MaxTorque = Vector3.new(0,0,0)
    bg.P = 9000
    bg.CFrame = workspace.CurrentCamera.CFrame
    bg.Parent = parent
end

local function onCharacterAdded(character)