Speed script

local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()
local hum = char:WaitForChild("Humanoid")

local UIS = game:GetService("UserInputService")

local normalWalk = 16     -- default Roblox walking speed
local superWalk = 400      -- change this to your desired speed

local speeding = false

-- Handle character respawn (fixes speed resetting)
player.CharacterAdded:Connect(function(newChar)
	char = newChar
	hum = newChar:WaitForChild("Humanoid")
end)

UIS.InputBegan:Connect(function(input, gpe)
	if gpe then return end

	if input.KeyCode == Enum.KeyCode.G then
		speeding = not speeding
		
		if speeding then
			hum.WalkSpeed = superWalk
			print("Speed ON")
		else
			hum.WalkSpeed = normalWalk
			print("Speed OFF")
		end
	end
end)