Why is my number value not adding?

local Goal = script.Parent
local debounce = false
local GoalVal = script.Parent.Goals

function onTouch(part)
    local Ball = part.Parent:findFirstChild("ScoreBall")
    if Ball ~= nil and debounce == false then
        local Mes = Instance.new("Message")
        Mes.Text = "Blue Team Scored!"
        Mes.Parent = game.Workspace
        GoalVal = GoalVal + 1 --HERE
        wait(5)
        local pl = game.Players:GetChildren()
        for i=1,#pl do
        pl[i].Character.Humanoid.Health = 0
        Mes:Remove()
        end
    end
    end

Goal.Touched:connect(onTouch)

function Endgame()
    wait(4.9)
    local pla = game.Players:GetChildren()
        for i=1,#pla do
        pla[i].TeamColor = "Lavender"
    end
end

if GoalVal.Value == 2 then Endgame()
end