local player, mouse, userInputService = game.Players.LocalPlayer, game.Players.LocalPlayerGetMouse(), gameGetService(UserInputService)
local screenGui, frame = Instance.new(ScreenGui), Instance.new(Frame)
screenGui.Parent, screenGui.Name = player.PlayerGui, NexUsFlyGui
frame.Size, frame.Position = UDim2.new(0, 200, 0, 100), UDim2.new(0.5, -100, 0.5, -50)
frame.BackgroundColor3, frame.BorderSizePixel = Color3.fromRGB(0, 0, 0), 0
frame.Parent = screenGui

-- Speed slider and label
local slider = Instance.new(Slider)
slider.Size, slider.Position = UDim2.new(0, 180, 0, 20), UDim2.new(0, 10, 0, 50)
slider.MinValue, slider.MaxValue, slider.Value = 1, 1000, 100
slider.Parent = frame
local speedLabel = Instance.new(TextLabel)
speedLabel.Size, speedLabel.Position = UDim2.new(0, 200, 0, 20), UDim2.new(0, 10, 0, 20)
speedLabel.Text, speedLabel.TextColor3 = Fly Speed 100, Color3.fromRGB(255, 255, 255)
speedLabel.BackgroundTransparency = 1
speedLabel.Parent = frame

-- Draggable GUI functionality
local dragging, dragStart, startPos = false, nil, nil
frame.InputBeganConnect(function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton1 then
        dragging, dragStart, startPos = true, input.Position, frame.Position
    end
end)
frame.InputChangedConnect(function(input)
    if dragging and input.UserInputType == Enum.UserInputType.MouseMovement then
        local delta = input.Position - dragStart
        frame.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
    end
end)
frame.InputEndedConnect(function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton1 then
        dragging = false
    end
end)

-- Fly logic
local flying, bodyVelocity, flySpeed = false, Instance.new(BodyVelocity), 100
local function toggleFly()
    local char, rootPart = player.Character, player.Character and player.CharacterFindFirstChild(HumanoidRootPart)
    if not char or not rootPart then return end
    if flying then
        bodyVelocityDestroy()
        flying = false
    else
        flying = true
        bodyVelocity.MaxForce = Vector3.new(100000, 100000, 100000)
        bodyVelocity.Velocity = Vector3.new(0, 50, 0)
        bodyVelocity.Parent = rootPart
        gameGetService(RunService).HeartbeatConnect(function()
            if flying then
                bodyVelocity.Velocity = (mouse.Hit.p - rootPart.Position).unit  flySpeed
            end
        end)
    end
end

-- Toggle flying on spacebar
userInputService.InputBeganConnect(function(input)
    if input.KeyCode == Enum.KeyCode.Space then
        toggleFly()
    end
end)

-- Update speed on slider change
slider.ChangedConnect(function()
    flySpeed = slider.Value
    speedLabel.Text = Fly Speed  .. math.floor(flySpeed)
end)