Can someone tell me where I'm wrong?

Okay so I want to do a damage script with a NumberValue but for some reason it kills the dummy I'm testing the move on,can someone tell me where I did wrong? Here's the script

wait(3)
local debounce =  false
Player = script.Parent.Parent.Parent
n = script.Parent
mouse = Player:GetMouse()
run = game:GetService("RunService")
duh = 0

function pizza(mouse)
    if debounce == false then
        debounce = true
            local x = Instance.new("Part")
            x.Shape = "Ball"
            x.Anchored = true
            x.CanCollide = false
            x.Reflectance = 0
            x.Transparency = 1
            x.TopSurface = "Smooth"
            x.BottomSurface = "Smooth"
            x.Parent = Workspace
            x.Size = Vector3.new(270.05, 70.48, 289.81)
            x.BrickColor = BrickColor.new("White")
            x.Name = Player.Name
            x.Parent = Workspace
            x.CFrame = Player.Character.Torso.CFrame *CFrame.new(0, -3, 0)
            local x1 = Instance.new("Part")
            x1.Shape = "Ball"
            x1.Anchored = true
            x1.CanCollide = false
            x1.Reflectance = 0.1
            x1.Transparency = 0.8
            x1.TopSurface = "Smooth"
            x1.BottomSurface = "Smooth"
            x1.Parent = Workspace
            x1.Size = Vector3.new(150, 150, 150)
            x1.BrickColor = BrickColor.new("White")
            x1.Name = Player.Name
            x1.Parent = Workspace
            x1.CFrame = Player.Character.Torso.CFrame *CFrame.new(0, -3, 0)
            m = Instance.new("SpecialMesh", x1)
            m.MeshType = "Sphere"
            m.Scale = Vector3.new(2, 1, 2)
                x.Touched:connect(function(Part) 
    if Part.Parent:FindFirstChild("Humanoid") ~= nil and Part.Parent:FindFirstChild("Humanoid") ~= Player.Character.Humanoid then
    for i, v in pairs(Part.Parent:GetChildren()) do
        if v:IsA("NumberValue") and v.Name == "damage" then return 
            else
                damage = Instance.new("NumberValue", Part.Parent)
                damage.Value = 30
                    Part.Parent.Humanoid.Health = Part.Parent.Humanoid.Health -damage.Value
                Part.Parent.Humanoid.Sit = true
                wait(0.1)
                Part.Parent.Torso.Velocity = Vector3.new(math.random(-500,500),650,math.random(-500,500))
            end
        end
    end
    wait(0.025)
end)
            game.Debris:AddItem(x, 5)
            game.Debris:AddItem(x1, 5)

    wait(60)
    debounce = false
    end
end


function onSelected(mouse)
    mouse.Button1Down:connect(function() pizza(mouse) end)
end

n.Selected:connect(onSelected)