change your size script

if game:GetService("RunService"):IsClient() then error("Script must be server-side in order to work; use h/ and not hl/") end
local Player,game,owner = owner,game
local RealPlayer = Player
do
	print("FE Compatibility code V2 by Mokiros")
	local RealPlayer = RealPlayer
	script.Parent = RealPlayer.Character

	--Fake event to make stuff like Mouse.KeyDown work
	local Disconnect_Function = function(this)
		this[1].Functions[this[2]] = nil
	end
	local Disconnect_Metatable = {__index={disconnect=Disconnect_Function,Disconnect=Disconnect_Function}}
	local FakeEvent_Metatable = {__index={
		Connect = function(this,f)
			local i = tostring(math.random(0,10000))
			while this.Functions[i] do
				i = tostring(math.random(0,10000))
			end
			this.Functions[i] = f
			return setmetatable({this,i},Disconnect_Metatable)
		end
	}}
	FakeEvent_Metatable.__index.connect = FakeEvent_Metatable.__index.Connect
	local function fakeEvent()
		return setmetatable({Functions={}},FakeEvent_Metatable)
	end

	--Creating fake input objects with fake variables
    local FakeMouse = {Hit=CFrame.new(),KeyUp=fakeEvent(),KeyDown=fakeEvent(),Button1Up=fakeEvent(),Button1Down=fakeEvent(),Button2Up=fakeEvent(),Button2Down=fakeEvent()}
    FakeMouse.keyUp = FakeMouse.KeyUp
    FakeMouse.keyDown = FakeMouse.KeyDown
	local UIS = {InputBegan=fakeEvent(),InputEnded=fakeEvent()}
	local CAS = {Actions={},BindAction=function(self,name,fun,touch,...)
		CAS.Actions[name] = fun and {Name=name,Function=fun,Keys={...}} or nil
	end}
	--Merged 2 functions into one by checking amount of arguments
	CAS.UnbindAction = CAS.BindAction

	--This function will trigger the events that have been :Connect()'ed
	local function TriggerEvent(self,ev,...)
		for _,f in pairs(self[ev].Functions) do
			f(...)
		end
	end
	FakeMouse.TriggerEvent = TriggerEvent
	UIS.TriggerEvent = TriggerEvent

	--Client communication
	local Event = Instance.new("RemoteEvent")
	Event.Name = "UserInput_Event"
	Event.OnServerEvent:Connect(function(plr,io)
	    if plr~=RealPlayer then return end
		FakeMouse.Target = io.Target
		FakeMouse.Hit = io.Hit
		if not io.isMouse then
			local b = io.UserInputState == Enum.UserInputState.Begin
			if io.UserInputType == Enum.UserInputType.MouseButton1 then
				return FakeMouse:TriggerEvent(b and "Button1Down" or "Button1Up")
			end
			if io.UserInputType == Enum.UserInputType.MouseButton2 then
				return FakeMouse:TriggerEvent(b and "Button2Down" or "Button2Up")
			end
			for _,t in pairs(CAS.Actions) do
				for _,k in pairs(t.Keys) do
					if k==io.KeyCode then
						t.Function(t.Name,io.UserInputState,io)
					end
				end
			end
			FakeMouse:TriggerEvent(b and "KeyDown" or "KeyUp",io.KeyCode.Name:lower())
			UIS:TriggerEvent(b and "InputBegan" or "InputEnded",io,false)
	    end
	end)
	Event.Parent = NLS([==[local Event = script:WaitForChild("UserInput_Event")
	local Mouse = owner:GetMouse()
	local UIS = game:GetService("UserInputService")
	local input = function(io,RobloxHandled)
		if RobloxHandled then return end
		--Since InputObject is a client-side instance, we create and pass table instead
		Event:FireServer({KeyCode=io.KeyCode,UserInputType=io.UserInputType,UserInputState=io.UserInputState,Hit=Mouse.Hit,Target=Mouse.Target})
	end
	UIS.InputBegan:Connect(input)
	UIS.InputEnded:Connect(input)
	local h,t
	--Give the server mouse data every second frame, but only if the values changed
	--If player is not moving their mouse, client won't fire events
	local HB = game:GetService("RunService").Heartbeat
	while true do
		if h~=Mouse.Hit or t~=Mouse.Target then
			h,t=Mouse.Hit,Mouse.Target
			Event:FireServer({isMouse=true,Target=t,Hit=h})
		end
		--Wait 2 frames
		for i=1,2 do
			HB:Wait()
		end
	end]==],script)

	----Sandboxed game object that allows the usage of client-side methods and services
	--Real game object
	local RealGame = game

	--Metatable for fake service
	local FakeService_Metatable = {
		__index = function(self,k)
			local s = rawget(self,"_RealService")
			if s then
				return typeof(s[k])=="function"
				and function(_,...)return s[k](s,...)end or s[k]
			end
		end,
		__newindex = function(self,k,v)
			local s = rawget(self,"_RealService")
			if s then s[k]=v end
		end
	}
	local function FakeService(t,RealService)
		t._RealService = typeof(RealService)=="string" and RealGame:GetService(RealService) or RealService
		return setmetatable(t,FakeService_Metatable)
	end

	--Fake game object
	local FakeGame = {
		GetService = function(self,s)
			return rawget(self,s) or RealGame:GetService(s)
		end,
		Players = FakeService({
			LocalPlayer = FakeService({GetMouse=function(self)return FakeMouse end},Player)
		},"Players"),
		UserInputService = FakeService(UIS,"UserInputService"),
		ContextActionService = FakeService(CAS,"ContextActionService"),
		RunService = FakeService({
			_btrs = {},
			RenderStepped = RealGame:GetService("RunService").Heartbeat,
			BindToRenderStep = function(self,name,_,fun)
				self._btrs[name] = self.Heartbeat:Connect(fun)
			end,
			UnbindFromRenderStep = function(self,name)
				self._btrs[name]:Disconnect()
			end,
		},"RunService")
	}
	rawset(FakeGame.Players,"localPlayer",FakeGame.Players.LocalPlayer)
	FakeGame.service = FakeGame.GetService
	FakeService(FakeGame,game)
	--Changing owner to fake player object to support owner:GetMouse()
	game,owner = FakeGame,FakeGame.Players.LocalPlayer
end

function giant(p, size)
	local pchar = p.Character
	if pchar then
		local function scale(chr,scl)

			for _,v in pairs(pchar:GetChildren()) do
				if v:IsA("Hat") or v:IsA("Accessory") then
					local mesh = v.Handle:FindFirstChildOfClass("SpecialMesh")
					mesh.Scale = Vector3.new(scl , scl, scl)
				end
			end

		    local Head = chr['Head']
		    local Torso = chr['Torso']
		    local LA = chr['Left Arm']
		    local RA = chr['Right Arm']
		    local LL = chr['Left Leg']
		    local RL = chr['Right Leg']
		    local HRP = chr['HumanoidRootPart']

		    wait(0.1)

		    Head.formFactor = 3
		    Torso.formFactor = 3
		    LA.formFactor = 3
		    RA.formFactor = 3
		    LL.formFactor = 3
		    RL.formFactor = 3
		    HRP.formFactor = 3

		    Head.Size = Vector3.new(scl * 2, scl, scl)
		    Torso.Size = Vector3.new(scl * 2, scl * 2, scl)
		    LA.Size = Vector3.new(scl, scl * 2, scl)
		    RA.Size = Vector3.new(scl, scl * 2, scl)
		    LL.Size = Vector3.new(scl, scl * 2, scl)
		    RL.Size = Vector3.new(scl, scl * 2, scl)
		    HRP.Size = Vector3.new(scl * 2, scl * 2, scl)

		    local Motor1 = Instance.new('Motor6D', Torso)
		    Motor1.Part0 = Torso
		    Motor1.Part1 = Head
	    	Motor1.C0 = CFrame.new(0, 1 * scl, 0) * CFrame.Angles(-1.6, 0, 3.1)
	    	Motor1.C1 = CFrame.new(0, -0.5 * scl, 0) * CFrame.Angles(-1.6, 0, 3.1)
	    	Motor1.Name = "Neck"

	    	local Motor2 = Instance.new('Motor6D', Torso)
	    	Motor2.Part0 = Torso
	    	Motor2.Part1 = LA
	    	Motor2.C0 = CFrame.new(-1 * scl, 0.5 * scl, 0) * CFrame.Angles(0, -1.6, 0)
	    	Motor2.C1 = CFrame.new(0.5 * scl, 0.5 * scl, 0) * CFrame.Angles(0, -1.6, 0)
	    	Motor2.Name = "Left Shoulder"

	    	local Motor3 = Instance.new('Motor6D', Torso)
	   		Motor3.Part0 = Torso
	    	Motor3.Part1 = RA
	    	Motor3.C0 = CFrame.new(1 * scl, 0.5 * scl, 0) * CFrame.Angles(0, 1.6, 0)
	    	Motor3.C1 = CFrame.new(-0.5 * scl, 0.5 * scl, 0) * CFrame.Angles(0, 1.6, 0)
	    	Motor3.Name = "Right Shoulder"

	    	local Motor4 = Instance.new('Motor6D', Torso)
	    	Motor4.Part0 = Torso
	    	Motor4.Part1 = LL
	    	Motor4.C0 = CFrame.new(-1 * scl, -1 * scl, 0) * CFrame.Angles(0, -1.6, 0)
	    	Motor4.C1 = CFrame.new(-0.5 * scl, 1 * scl, 0) * CFrame.Angles(0, -1.6, 0)
	    	Motor4.Name = "Left Hip"

	    	local Motor5 = Instance.new('Motor6D', Torso)
	    	Motor5.Part0 = Torso
	    	Motor5.Part1 = RL
	    	Motor5.C0 = CFrame.new(1 * scl, -1 * scl, 0) * CFrame.Angles(0, 1.6, 0)
	    	Motor5.C1 = CFrame.new(0.5 * scl, 1 * scl, 0) * CFrame.Angles(0, 1.6, 0)
	    	Motor5.Name = "Right Hip"

	    	local Motor6 = Instance.new('Motor6D', HRP)
	    	Motor6.Part0 = HRP
	    	Motor6.Part1 = Torso
	    	Motor6.C0 = CFrame.new(0, 0, 0) * CFrame.Angles(-1.6, 0, -3.1)
	    	Motor6.C1 = CFrame.new(0, 0, 0) * CFrame.Angles(-1.6, 0, -3.1)

		end

		scale(pchar, size)
		pchar.Humanoid.WalkSpeed = 15 * size

		for _,v in pairs(game.Lighting:GetChildren()) do
			if v:IsA("Hat") then
				v.Parent = pchar
			end
		end
	end
end

local plr = game.Players.LocalPlayer
giant(plr,1)


local csize = 1

local sgui = Instance.new("ScreenGui", game.Players.LocalPlayer.PlayerGui)
local base = Instance.new("Frame", sgui)
base.BackgroundTransparency = 1
base.Size = UDim2.new(0, 110, 0, 200)
base.Position = UDim2.new(1, -120, 1, -180)
local indicator = Instance.new("TextLabel", base)
indicator.Size = UDim2.new(1, 0, 0, 25)
indicator.TextColor3 = Color3.new(1, 1, 1)
indicator.BackgroundTransparency = 0
indicator.FontSize = Enum.FontSize.Size18
indicator.Font = Enum.Font.SourceSans
indicator.Text = "Current Size: 3"
local PlusOne = Instance.new("TextButton", base)
PlusOne.BackgroundColor3 = Color3.new(214/255, 214/255, 214/255)
PlusOne.Position = UDim2.new(0, 0, 0, 40)
PlusOne.Size = UDim2.new(1, 0, 0.5, -50)
PlusOne.BorderSizePixel = 2
PlusOne.Font = Enum.Font.SourceSansBold
PlusOne.FontSize = Enum.FontSize.Size24
PlusOne.Text = "+.1 Size"
local MinusOne = Instance.new("TextButton", base)
MinusOne.BackgroundColor3 = Color3.new(214/255, 214/255, 214/255)
MinusOne.Position = UDim2.new(0, 0, 0.5, 10)
MinusOne.Size = UDim2.new(1, 0, 0.5, -50)
MinusOne.Text = "-.1 Size"
MinusOne.BorderSizePixel = 2
MinusOne.Font = Enum.Font.SourceSansBold
MinusOne.FontSize = Enum.FontSize.Size24

PlusOne.MouseButton1Down:connect(function()
	csize = csize + .1
	giant(plr, csize)
	indicator.Text = "Current Size: "..tostring(csize)
end)

MinusOne.MouseButton1Down:connect(function()
	csize = csize - .1
	giant(plr, csize)
	indicator.Text = "Current Size: "..tostring(csize)
end)