My script isn't working. Help?

My local script, when a projectile is fired, meaning, there is no direct contact, it's supposed to print the Player, and Humanoid.

local Player = script.Parent.Parent
 local mouse = Player:GetMouse()
function onKeyDown(key)

    Key = key:lower()
    if key == "z" then
        print("Hi")

    Game:GetService("Chat"):Chat(Player.Character.Head, "I'll finish you off with this last hit!")



    x = Instance.new("Part")
    x.Name = "x"
    x.Shape = "Ball"
    x.BrickColor = BrickColor.new("Really red")
    x.Size = Vector3.new(3,3,3)
    x.CanCollide = false
            x.CFrame = Player.Character.Torso.CFrame*CFrame.new(0, 0, -12)

    s = Instance.new("Sparkles", x)
    y = Instance.new("BodyVelocity", x)
    y.maxForce = Vector3.new(math.huge, math.huge, math.huge)
    y.velocity = Player.Character.Torso.CFrame.lookVector*120
    x.Parent = Workspace
    kk = script.k:Clone()
    kk.Parent = x
    x.Name = Player.Name
    game:GetService("Debris"):AddItem(x, 7)

    kk.Disabled = false
    end


end
mouse.KeyDown:connect(onKeyDown)

function tagHumanoid(humanoid, player)
    local creator_tag = Instance.new("ObjectValue")
    creator_tag.Value = player
    creator_tag.Name = "creator"
    creator_tag.Parent = humanoid
    print(player.Name)
    print(humanoid.Name)
end

function untagHumanoid(humanoid)
    if humanoid ~= nil then
        local tag = humanoid:findFirstChild("creator")
        if tag ~= nil then
            tag.Parent = nil
        end
    end
end

This is the 2ND time in which I ask a question similar to this. The first time, they completely ignored what I said.