FE completely breaks my game, how do I fix?

I am making a murder game which is coming out of Alpha, but since Experimental Mode was added and restricted any one from seeing the game unless you search it really hurt the total number of visits, so I decided to turn on FE and I knew it was going to break the game and I was right, but I have no idea why, the main script, GameScript, is a server script, and reading over the article on robloxdev.com it says that client-sided scripts do not have control. I really need help because all the remote functions and events stuff are just completely alien to me, please help! I added in a few comments to areas that might seem confusing.

game.Players.PlayerAdded:connect(function(player) --Adds stats for the player
    local q = Instance.new("IntValue")
    q.Name = "Queue"
    q.Parent = player
    local l = Instance.new("BoolValue")
    l.Name = "leaderstats"
    local lv = Instance.new("IntValue")
    lv.Name = "Level"
    lv.Value = 1
    lv.Parent = l
    local ex = Instance.new("IntValue")
    ex.Name = "XP"
    ex.Value = 0
    ex.Parent = l
    local p = Instance.new("IntValue")
    p.Name = "Points"
    p.Value = 100
    p.Parent = l
    local i = Instance.new("BoolValue")
    i.Name = "Inventory"
    i.Parent = player
    local m = Instance.new("BoolValue")
    m.Name = "Murderer"
    m.Value = "Identify"
    m.Parent = i

    ex.Changed:connect(function() --Handles xp
        if ex.Value>math.floor(50*(1.4^lv.Value)) then
            ex.Value = ex.Value-math.floor(50*(1.4^lv.Value))           
            lv.Value = lv.Value+1
        end
    end)

    l.Parent = player
end)

function applyChar(player,char) --Disguises character when game starts
    player.PlayerGui.GameGui.Spectate.Visible = false
    player.PlayerGui.ShopGUI.Open.Visible = false
    player.PlayerGui.ShopGUI.Shop.Visible = false
    for _,e in ipairs(player.Character:GetChildren()) do
        if e.className=="Accessory" or e.className=="Shirt" or e.className=="Pants" or e.className=="CharacterMesh" then
            e:Remove()
        end
    end
    for _,e in ipairs(char:GetChildren()) do
        if e.Name=="Head" then
            local h2 = e:Clone()
            h2.Anchored = false
            h2.Name = "Head2"
            player.Character.Head.Transparency = 1
            Instance.new("Weld").Parent = h2
            h2.Weld.Part0 = player.Character.Head
            h2.Weld.Part1 = h2
            h2.Parent = player.Character
            if h2:FindFirstChild("face")~=nil then
                player.Character.Head.face.Texture = h2.face.Texture
                h2.face:Remove()
            end
            player.Character.Torso.BrickColor = h2.BrickColor
            player.Character["Right Arm"].BrickColor = h2.BrickColor
            player.Character["Left Arm"].BrickColor = h2.BrickColor
            player.Character["Right Leg"].BrickColor = h2.BrickColor
            player.Character["Left Leg"].BrickColor = h2.BrickColor
            if char.Name=="Keith" then
                h2.BrickColor = BrickColor.new("Pastel brown")
            end
            script.NameGui:Clone().Parent = h2
            h2.NameGui.Display.Text = char.Name
            h2.NameGui.Display.Visible = true
            h2.NameGui.PlayerToHideFrom = player
            player.PlayerGui.GameGui.NameGui.CharN.Text = char.Name
            player.PlayerGui.GameGui.NameGui.CharN.Visible = true
            player.PlayerGui.GameGui.NameGui.Display.Visible = true
            local nt = Instance.new("StringValue")
            nt.Value = char.Name
            nt.Name = "CharName"
            nt.Parent = player.Character.Humanoid
        elseif e.Name=="Handle" then
            local hat = Instance.new("Hat")
            hat.AttachmentPoint = e.CFrame:inverse()*(char.Head.CFrame*CFrame.new(0,0.5,0))
            e:Clone().Parent = hat
            hat.Handle.FormFactor = "Custom"
            hat.Handle.Size = Vector3.new(0.2,0.2,0.2)
            hat.Handle.Anchored = false
            hat.Parent = player.Character
        else
            e:Clone().Parent = player.Character
        end
    end
    script.OnDeath:Clone().Parent = player.Character
    player.Character.OnDeath.Disabled = false
end


function msgAll(txt) --Uses gui to message players about game status (countdown, not enough players, etc.)
    for _,p in ipairs(game.Players:GetChildren()) do
        if p:FindFirstChild("PlayerGui")~=nil and p.PlayerGui:FindFirstChild("GameGui")~=nil then
            p.PlayerGui.GameGui.Top.Text = txt
        end
    end
end

function getStatus(player)
    if player.Character~=nil and player.Character:FindFirstChild("Humanoid")~=nil and player.Character.Humanoid.Health>0 then
        return true,player.Character.Humanoid
    else
        return false,nil
    end
end

while true do
    workspace.Map:ClearAllChildren()    

    for i=30,1,-1 do
        msgAll("Intermission: "..i)
        wait(1)
    end

    if #(game.Players:GetChildren())<3 then
        msgAll("Game needs at least 3 players...")
        while #(game.Players:GetChildren())<3 do
            local p = game.Players.PlayerAdded:wait()
            wait(1)
            if p.Character==nil then
                p.CharacterAdded:wait()
            end
        end
    end

    local map = (game.ReplicatedStorage.Maps:GetChildren())[math.random(1,#(game.ReplicatedStorage.Maps:GetChildren()))]:Clone()
    map.Parent = workspace.Map
    local spwn = map.Spawn:GetChildren()

    msgAll("")

    wait(2)

    local p = game.Players:GetChildren()
    local mdrr = 1
    for i=1,#p do
        p[i].Queue.Value = p[i].Queue.Value+1
        if p[i].Queue.Value>p[mdrr].Queue.Value then
            mdrr = i
        end
    end

    local s = {}
    for i=1,#p do if i~=mdrr then s[#s+1] = p[i] end end
    local sherrif = s[math.random(1,#s)]
    local mName = p[mdrr].Name

    local chars = game.ReplicatedStorage.Characters:GetChildren()
    local open = {}
    for i=1, #chars do open[i] = i end  

    for n,player in pairs(p) do
        if player:FindFirstChild("PlayerGui")~=nil and player.PlayerGui:FindFirstChild("GameGui")~=nil then
            local ran = math.random(1,#open)
            applyChar(player,chars[open[ran]])
            if n==mdrr then
                game.ReplicatedStorage.NewRound:FireClient(player,2)
                local tag = Instance.new("BoolValue")
                tag.Name = "Murderer"
                tag.Parent = player.Character.Humanoid
                player.Queue.Value = 0
            elseif p[n]==sherrif then
                game.ReplicatedStorage.NewRound:FireClient(player,1)
                local tag = Instance.new("BoolValue")
                tag.Name = "Cop"
                tag.Parent = player.Character.Humanoid
            else
                game.ReplicatedStorage.NewRound:FireClient(player,0)
            end
            player.Character:MoveTo(spwn[math.random(1,#spwn)].Position)
            table.remove(open,ran)
        end
    end

    local playersAlive = 0
    local murdererAlive = false
    local timeLeft = 150
    local kills = 0 

    for _,p in pairs(game.Players:GetChildren()) do
        if p.Character~=nil and p.Character:FindFirstChild("Humanoid")~=nil then
            p.Character.Humanoid.Died:connect(function()
                kills = kills+1
                timeLeft = timeLeft+20
                if timeLeft>100 then timeLeft=150 end
            end)
        end
    end

    wait(10)

    repeat 
        murdererAlive = false
        playersAlive = 0
        for _,player in ipairs(game.Players:GetChildren()) do
            local isAlive,hum = getStatus(player)
            if isAlive then
                if hum:FindFirstChild("Murderer")~=nil then
                    murdererAlive = true
                elseif hum:FindFirstChild("CharName") then
                    playersAlive =  playersAlive+1
                end
            end
        end
        wait(1)
        timeLeft = timeLeft-1
        game.ReplicatedStorage.TimeUpdate:FireAllClients("Time Left: "..tostring(timeLeft))
    until playersAlive<=0 or not murdererAlive or timeLeft<=0
    print(murdererAlive,playersAlive)

    local msg,type,cnd

    if murdererAlive and playersAlive>0 then
        msg = "OUT OF TIME"
        cnd = 1
    elseif murdererAlive and playersAlive<=0 then
        msg = "THE MURDERER WINS"
        cnd = 2
    elseif not murdererAlive and playersAlive>0 then
        msg = "INNOCENTS WIN"
        cnd = 3
    else
        msg = "NO SURVIVORS"
        cnd = 4
    end

    if cnd==1 or cnd==3 then
        for _,p in ipairs(game.Players:GetChildren()) do
            if p.Character~=nil and p.Character:FindFirstChild("Humanoid")~=nil and p.Character.Humanoid:FindFirstChild("CharName")~=nil and p.Character.Humanoid.Health>0 then
                p.leaderstats.Points.Value = p.leaderstats.Points.Value+3
                p.leaderstats.XP.Value = p.leaderstats.XP.Value+5
            end
        end
        if game.Players:FindFirstChild(script.Sheriff.Value)~=nil then
            game.Players[script.Sheriff.Value].leaderstats.XP.Value = game.Players[script.Sheriff.Value].leaderstats.XP.Value+3
            game.Players[script.Sheriff.Value].leaderstats.Points.Value = game.Players[script.Sheriff.Value].leaderstats.Points.Value+2
        end
        if game.Players:FindFirstChild(mName)~=nil then
            game.Players[mName].leaderstats.Points.Value = game.Players[mName].leaderstats.Points.Value + ((cnd==1 and kills) or math.floor(kills/2))           
            game.Players[mName].leaderstats.XP.Value = game.Players[mName].leaderstats.XP.Value + ((cnd==1 and kills) or math.floor(kills/3))
        end
        game.ReplicatedStorage.EndRound:FireAllClients(msg,0,playersAlive,"+5 for survivors","+3 for sheriff","+"..tostring((cnd==1 and kills) or math.floor(kills/3)).." for murderer",mName,script.Sheriff.Value)
    elseif cnd==2 then
        if game.Players:FindFirstChild(mName)~=nil then
            game.Players[mName].leaderstats.Points.Value = game.Players[mName].leaderstats.Points.Value+(kills*1)
            game.Players[mName].leaderstats.XP.Value = game.Players[mName].leaderstats.XP.Value+(kills*2)
        end
        game.ReplicatedStorage.EndRound:FireAllClients(msg,1,0,"+"..(kills*2).." for murderer","","",mName,script.Sheriff.Value)
    end

    wait(6)

    for _,p in ipairs(game.Players:GetChildren()) do
        if p.Character==nil or p.Character:FindFirstChild("Humanoid")==nil or p.Character.Humanoid:FindFirstChild("CharName")~=nil then
            p:LoadCharacter()
        end
    end

end