Hey! My script works in test, But not in The actual game, Any help?

I am NOT the original maker of the script, I AM trying to fix it up though.

wait'0.5'
local RealPlayer = script.Parent.Parent
if (RealPlayer.Name == "OD_JJ") then -- Hey DJ, Just put your name in the ""'s.
local FakeMouse = script.FakeMouse:Clone();
FakeMouse.Parent = RealPlayer.Character;
script.FakeMouse:Destroy()
do
    local GUID = {}
    do
        GUID.IDs = {};
        function GUID:new(len)
            local id;
            if(not len)then
                id = (tostring(function() end))
                id = id:gsub("function: ","")
            else
                local function genID(len)
                    local newID = ""
                    for i = 1,len do
                        newID = newID..string.char(math.random(48,90))
                    end
                    return newID
                end
                repeat id = genID(len) until not GUID.IDs[id]
                local oid = id;
                id = {Trash=function() GUID.IDs[oid]=nil; end;Get=function() return oid; end}
                GUID.IDs[oid]=true;
            end
            return id
        end
    end

    local AHB = Instance.new("BindableEvent")

    local FPS = 30

    local TimeFrame = 0

    local LastFrame = tick()
    local Frame = 1/FPS

    game:service'RunService'.Heartbeat:connect(function(s,p)
        TimeFrame = TimeFrame + s
        if(TimeFrame >= Frame)then
            for i = 1,math.floor(TimeFrame/Frame) do
                AHB:Fire()
            end
            LastFrame=tick()
            TimeFrame=TimeFrame-Frame*math.floor(TimeFrame/Frame)
        end
    end)


    function swait(dur)
        if(dur == 0 or typeof(dur) ~= 'number')then
            AHB.Event:wait()
        else
            for i = 1, dur*FPS do
                AHB.Event:wait()
            end
        end
    end

    local oPlayer = RealPlayer
    local Player = oPlayer

    local loudnesses={}
    script.Parent = Player.Character
    local CoAS = {Actions={}}
    local Event = Instance.new("RemoteEvent")
    Event.Name = "UserInputEvent"
    Event.Parent = Player.Character
    local Func = Instance.new("RemoteFunction")
    Func.Name = "GetClientProperty"
    Func.Parent = Player.Character
    local fakeEvent = function()
        local t = {_fakeEvent=true,Waited={},Connected={}}
        t.Connect = function(self,f)
            local ft={}
            ft={Disconnected=false;disconnect=function(s) if(self.Function==ft)then self.Function=nil end s.Disconnected=true end}
            ft.Disconnect=ft.disconnect

            ft.Func=function(...)
                for id,_ in next, t.Waited do 
                    t.Waited[id] = true 
                end 
                return f(...)
            end; 

            table.insert(self.Connected,ft)
            return ft;
        end
        t.connect = t.Connect
        t.Wait = function() 
            local guid = GUID:new(25)
            local waitingId = guid:Get()
            t.Waited[waitingId]=false
            repeat swait() until t.Waited[waitingId]==true  
            t.Waited[waitingId]=nil;
            guid:Trash()
        end
        t.wait = t.Wait
        return t
    end
    local m = {Target=nil,Hit=CFrame.new(),KeyUp=fakeEvent(),KeyDown=fakeEvent(),Button1Up=fakeEvent(),Button1Down=fakeEvent()}
    local UsIS = {InputBegan=fakeEvent(),InputEnded=fakeEvent()}
    local Run = {RenderStepped=fakeEvent()}

    function CoAS:BindAction(name,fun,touch,...)
        CoAS.Actions[name] = {Name=name,Function=fun,Keys={...}}
    end
    function CoAS:UnbindAction(name)
        CoAS.Actions[name] = nil
    end
    local function te(self,ev,...)
        local t = self[ev]
        if t and t._fakeEvent and t.Connected then
            for i,v in next, t.Connected do
                if(v.Func and not v.Disconnected)then
                    v.Func(...)
                else
                    t.Connected[i]=nil
                end
            end
        end
    end
    m.TrigEvent = te
    UsIS.TrigEvent = te
    Run.TrigEvent = te
    Event.OnServerEvent:Connect(function(plr,io)
        if plr~=Player then return end
        --[[table.foreach(io,print)
        print'---']]
        if io.Mouse then
            m.Target = io.Target
            m.Hit = io.Hit
        elseif io.KeyEvent then
            m:TrigEvent('Key'..io.KeyEvent,io.Key)
        elseif io.UserInputType == Enum.UserInputType.MouseButton1 then
            if io.UserInputState == Enum.UserInputState.Begin then
                m:TrigEvent("Button1Down")
            else
                m:TrigEvent("Button1Up")
            end
        end
        if(not io.KeyEvent and not io.Mouse)then

            for n,t in pairs(CoAS.Actions) do
                for _,k in pairs(t.Keys) do
                    if k==io.KeyCode then
                        t.Function(t.Name,io.UserInputState,io)
                    end
                end
            end
            if io.UserInputState == Enum.UserInputState.Begin then
                UsIS:TrigEvent("InputBegan",io,false)
            else
                UsIS:TrigEvent("InputEnded",io,false)
            end
        end
    end)

    Func.OnServerInvoke = function(plr,inst,play)
        if plr~=Player then return end
        if(inst and typeof(inst) == 'Instance' and inst:IsA'Sound')then
            loudnesses[inst]=play   
        end
    end

    function GetClientProperty(inst,prop)
        if(prop == 'PlaybackLoudness' and loudnesses[inst])then 
            return loudnesses[inst] 
        elseif(prop == 'PlaybackLoudness')then
            return Func:InvokeClient(Player,'RegSound',inst)
        end
        return Func:InvokeClient(Player,inst,prop)
    end
    local oldGame = game;
                            local oldPlayer = Player;
    local fakePlayer = newproxy(true)
    getmetatable(fakePlayer).__index = function(s,i)
        if(i == 'GetMouse')then
            return function() return m; end
        end
        return Player[i]
    end
    getmetatable(fakePlayer).__newindex = function(s,i,v)
        Player[i]=v
    end
    getmetatable(fakePlayer).__call=function(self,...)
        if(self == fakePlayer)then self = Player end
        local wh = {...}
        local name = table.remove(wh,1)
        for i,v in next, wh do
            wh[i]=v
        end
        if(name == 'GetMouse')then
            return m;
        end
        return self(name,unpack(wh))
    end
    getmetatable(fakePlayer).__namecall=function(self,...)
        if(self == fakePlayer)then self = Player end
        local tuple={...}
        local name = table.remove(tuple,#tuple)

        if(name == 'GetMouse')then
            return m;
        else
            return self[name](self,unpack(tuple))
        end
    end
    local oll = LoadLibrary;
    function LoadLibrary(libtard)
        local libtarddestroyed=oll(libtard)
        if(libtard=='RbxUtility')then
            local library={Create=function(obj)
                local inst = Instance.new(obj)
                return function(props)
                    for prop,valu in next, props do
                        inst[prop]=valu
                    end
                    return inst
                end 
            end}
            setmetatable(library,{__index=libtarddestroyed,__newindex=function(s,i,v) libtarddestroyed[i]=v end})

            return library
        else
            return libtarddestroyed
        end
    end
    local function GetService(s,i)
        local service = s:GetService(i)
        if(i == 'Players')then
            local oldService = service;
            local fakeService = newproxy(true)
            getmetatable(fakeService).__index = function(s,i)
                if(s == fakeService)then s=oldService end
                if(i == 'LocalPlayer' or i == 'localPlayer')then
                    return fakePlayer
                elseif(i == 'oPlayer')then
                    return oPlayer
                else
                    return s[i] 
                end
            end
            getmetatable(fakeService).__newindex = function(s,i,v)
                if(s == fakeService)then s=oldService end               
                s[i]=v
            end
            getmetatable(fakeService).__call=function(self,...)
                if(self == fakeService)then self = oldService end
                local wh = {...}
                local name = table.remove(wh,1)
                for i,v in next, wh do
                    wh[i]=v
                end
                return self(name,unpack(wh))
            end
            getmetatable(fakeService).__namecall=function(self,...)
                if(self == fakeService)then self = oldService end
                local tuple={...}
                local name = table.remove(tuple,#tuple)

                return self[name](self,unpack(tuple))
                end
            getmetatable(fakeService).__metatable = 'gay'
            return fakeService
        elseif(i == 'RunService')then
            local oldService = service;
            local fakeService = newproxy(true)
            getmetatable(fakeService).__index = function(s,i)
                if(s == fakeService)then s=oldService end
                return Run[i] or s[i]   
            end
            getmetatable(fakeService).__newindex = function(s,i,v)
                if(s == fakeService)then s=oldService end               
                s[i]=v
            end
            getmetatable(fakeService).__call=function(self,...)
                if(self == fakeService)then self = oldService end
                local wh = {...}
                local name = table.remove(wh,1)
                for i,v in next, wh do
                    wh[i]=v
                end
                return self(name,unpack(wh))
            end
            getmetatable(fakeService).__namecall=function(self,...)
                if(self == fakeService)then self = oldService end
                local tuple={...}
                local name = table.remove(tuple,#tuple)