Why are my GUI and tool not working in the actual game but works in studio?

Currently I am trying to make a non-experimental mode wizard battle game. The player has a certain amount of magic points they can use for spells. They can chose between three spells. When they equip their wand, they should see a GUI pop up telling them what spell they have selected. When they click, if they have enough magic points, the spell that they chose should go into action. The game works when I test by clicking on the play button but not on ROBLOX. I don't think it is the magic points because that works on ROBLOX. Thanks.

Here is my LocalScript in the tool:

local eq = false
local event = script.Parent:WaitForChild("RemoteEvent")
local spells = {"Light Bomb", "Lighting Rod", "Tidal Wave"}
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local tool = script.Parent
player.CharacterAdded:connect(function(character) 
    local spelltag = character:WaitForChild("SpellTag")
    local spellgui = player.PlayerGui:WaitForChild("ScreenGui"):WaitForChild("SpellLabel")
    local spell = spells[spelltag.Value]
    spellgui.Text = spell
    spelltag.Changed:connect(function()
        if eq then
            spell = spells[spelltag.Value]
            spellgui.Text = spell
        end
    end)

    local function onClick()
        if spell == "Light Bomb" then
            event:FireServer("Bomb", mouse.Hit)
        elseif spell == "Lighting Rod" then
            event:FireServer("Light", mouse.Hit, player)
        elseif spell == "Tidal Wave" then
            event:FireServer("Tidal", mouse.Hit, player)
        end
    end
    tool.Activated:connect(onClick)

    tool.Equipped:connect(function()
        eq = true
        spellgui.Visible = true
    end)

    tool.Unequipped:connect(function()
        eq = false
        spellgui.Visible = false
    end)
end)

Here is the Server Script in the tool:

local event = script.Parent:WaitForChild("RemoteEvent")
local Connection
local magic = script.Parent.Parent.Parent.Character:WaitForChild("MagicTag")
function createBomb(location)
    local bomb = game:GetService("ServerStorage"):WaitForChild("lightbomb"):Clone()
    bomb.CFrame = location
    bomb.Parent = game.Workspace
end

function createTidal(location, player)
    local tidal = game:GetService("ServerStorage"):WaitForChild("tidalwave"):Clone()
    tidal.CFrame = script.Parent:WaitForChild("MagicPart").CFrame
    tidal:WaitForChild("NotKill").Value = player.Name
    tidal:WaitForChild("BodyPosition").Position = location.p
    tidal.Parent = game.Workspace
end

function raycast(location, player)
    local ray = Ray.new(script.Parent:WaitForChild("MagicPart").CFrame.p, (location.p - script.Parent:WaitForChild("MagicPart").CFrame.p).unit * 300)
    local part, position = game.Workspace:FindPartOnRay(ray, player.Character, false, true)
    local lightning = game:GetService("ServerStorage"):WaitForChild("lightning"):Clone()
    lightning.Parent = game.Workspace
    local distance = (script.Parent:WaitForChild("MagicPart").CFrame.p - position).magnitude
    lightning.Size = Vector3.new(0.3,0.3,distance)
    lightning.CFrame = CFrame.new(script.Parent:WaitForChild("MagicPart").CFrame.p, position) * CFrame.new(0,0, -distance / 2)
    game:GetService("Debris"):AddItem(lightning, 0.1)
end

local function decideEvent(player, ...)
    local tuple = {...}
    if tuple[1] == "Bomb" then
        if magic.Value >= 20 then
            magic.Value = magic.Value - 20
            createBomb(tuple[2])
        end
    elseif tuple[1] == "Tidal" then
        if magic.Value >= 35 then
            magic.Value = magic.Value - 35
            createTidal(tuple[2], tuple[3])
        end
    elseif tuple[1] == "Light" then
        if magic.Value >= 5 then
            magic.Value = magic.Value - 5
            raycast(tuple[2], tuple[3])
        end
    end
end

local tool = script.Parent
tool.Equipped:connect(function()
    Connection = event.OnServerEvent:connect(decideEvent)
end)

tool.Unequipped:connect(function()
    Connection:disconnect()
end)