Homing script not working correctly?!

Hi, so I have a homing attack script and I am trying to set out targets for sonic to destroy, but my problem is that sonic can't aim his attack at the targets at all and I have no idea why!!!

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local Fall = false
local charging = false
local homing = false
local speed = 30
local direction = Vector3.new(0, 0, 1)
local lastPosition = Vector3.new(0, 0, 0)
local orginPosition = Vector3.new(0, 0, 0)
local lastTarget 
local velocity = Instance.new("BodyVelocity")
local spin = Instance.new("Part")
spin.Name = "Spin"
spin.Anchored = true
spin.CanCollide = false
spin.BackSurface = 0
spin.BottomSurface = 0
spin.FrontSurface = 0
spin.LeftSurface = 0
spin.RightSurface = 0
spin.TopSurface = 0
spin.Shape = 0
spin.Material = "Neon"
spin.Size = Vector3.new(4, 4, 4)
spin.Transparency = 1
mesh = Instance.new("SpecialMesh")
mesh.Parent = spin
mesh.Scale = Vector3.new(0.05, 0.05, 0.05)
mesh.MeshId = "rbxassetid://489671777"
mesh.TextureId = "rbxassetid://489667787"
mesh.Offset = Vector3.new(0, -0.5, 0)
ParticleEmitter = Instance.new("ParticleEmitter")
ParticleEmitter.Texture = "http://www.roblox.com/asset/?id=249481494"
ParticleEmitter.LockedToPart = true
local hint = Instance.new("Hint")
hint.Text = "Spin Dash: Click and release | Homing attack: Double press spacebar"
function checkSit()
  if player.Character == nil then
    return true
  end
  if player.Character:FindFirstChild("Humanoid") == nil then
    return true
  end
  if player.Character.Humanoid.Sit == true then
    return true
  end
  return false
end
function transparent(value, object)
  if object == nil then
    return
  end
  object = object:children()
  if #object < 1 then
    return
  end
  for i = 1, #object do
    if object[i]:IsA("BasePart") and object[i].Name ~= "Spin" and object[i].Name ~= "HumanoidRootPart" then
      object[i].Transparency = value
    else
      transparent(value, object[i])
    end
  end
end
function onButton1Down(key)
  if key == "e" then
    local torso = player.Character:FindFirstChild("Torso")
    if charging == true or torso == nil or homing == true or checkSit() == true then
      return
    end
    charging = true
    speed = 50
    spin.BrickColor = torso.BrickColor
    spin.Parent = player.Character
    for i = 1, 50 do
      if charging == false then
        return
      end
      if Fall == true then
        break
      end
      speed = speed + 3
      spin.CFrame = CFrame.new(Vector3.new(0, 0, 0), direction) + torso.Position - Vector3.new(0, 1.01, 0)
      spin.CFrame = spin.CFrame * CFrame.fromEulerAnglesXYZ(-1.7 * i, 0, 0)
      if spin.Parent == nil then
        spin.Parent = player.Character
      end
      wait()
      if i == 1 then
        transparent(1, player.Character)
      end
    end
    if Fall == true then
      transparent(1, player.Character)
    end
    onButton1Up()
  end
end
function onButton1Up(key)
  if key == "e" then
    local torso = player.Character:FindFirstChild("Torso")
    if torso == nil or Fall == true or charging == false or checkSit() == true then
      return
    end
    charging = false
    lastPosition = torso.Position
    velocity.maxForce = Vector3.new(100000, 0, 100000)
    velocity.Parent = player.Character:FindFirstChild("Torso")
    for i = 1, speed do
      if Fall == true or charging == true then
        break
      end
      if checkSit() == true then
        break
      end
      speed = speed - 1
      local trail = spin:clone()
      trail.Transparency = 0.6
      trail.TopSurface = 0
      trail.BottomSurface = 0
      trail.CFrame = spin.CFrame
      trail.Parent = player.Character
      mesh = Instance.new("SpecialMesh")
      mesh.Parent = trail
      mesh.Scale = Vector3.new(0.04, 0.04, 0.04)
      mesh.MeshId = "rbxassetid://464790010"
      mesh.TextureId = "rbxassetid://476262394"
      mesh.Offset = Vector3.new(0, -0.5, 0)
      ParticleEmitter = Instance.new("ParticleEmitter")
      ParticleEmitter.Texture = "rbxassetid://249481494"
      game:service("Debris"):addItem(trail, 0.15)
      spin.CFrame = CFrame.new(Vector3.new(0, 0, 0), direction) + torso.Position - Vector3.new(0, 1.01, 0)
      spin.CFrame = spin.CFrame * CFrame.fromEulerAnglesXYZ(-1.7 * i, 0, 0)
      if spin.Parent == nil then
        spin.Parent = player.Character
      end
      velocity.velocity = direction * speed
      lastPosition = torso.Position
      if i == 1 then
        transparent(0, player.Character)
      end
      wait()
    end
    if Fall == false or charging == false then
      velocity.Parent = nil
      spin.Parent = nil
    end
  end
end
function onKeyDown(key)
  key = key:lower()
  local torso = player.Character:FindFirstChild("Torso")
  if key == " " and Fall == false and torso ~= nil then
    Fall = true
    spin.BrickColor = torso.BrickColor
    for i = 1, 15 do
      if homing == true or Fall == false then
        break
      end
      spin.CFrame = torso.CFrame * CFrame.fromEulerAnglesXYZ(-0.5 * i, 0, 0)
      if spin.Parent == nil then
        spin.Parent = player.Character
      end
      wait()
      if i == 2 then
     
      end
    end
    if homing == false then
      spin.Parent = nil
  
    end
    Fall = false
  elseif key == " " and homing == false and torso ~= nil then
    homing = true
    Fall = false
 
    local target 
    local distance = 80
    local list = game.Workspace:children()
    for i = 1, #list do
      if list[i].className == "Part" and list[i].Size.magnitude < 1 and list[i] ~= lastTarget and distance > list[i].Position - torso.Position.magnitude and list[i].Position.y < torso.Position.y then
        target = list[i]
        distance = list[i].Position - torso.Position.magnitude
      end
    end
    if target ~= nil then
      lastTarget = target
      velocity.maxForce = Vector3.new(100000, 100000, 100000)
      velocity.Parent = torso
   
      for i = 1, 50 do
        if Fall == false or torso.Position - target.Position.magnitude < 4 then
          break
        end
        spin.CFrame = torso.CFrame * CFrame.fromEulerAnglesXYZ(-1 * i, 0, 0)
        if spin.Parent == nil then
          spin.Parent = player.Character
        end
        local trail = spin:clone()
        trail.Transparency = 1
        trail.TopSurface = 0
        trail.BottomSurface = 0
        trail.CFrame = spin.CFrame
        trail.Parent = player.Character
        mesh = Instance.new("SpecialMesh")
        mesh.Parent = spin
        mesh.Scale = Vector3.new(0.04, 0.04, 0.04)
        mesh.MeshId = "rbxassetid://464790010"
        mesh.TextureId = "rbxassetid://484181635"
        mesh.Offset = Vector3.new(0, -0.5, 0)
        ParticleEmitter = Instance.new("ParticleEmitter")
        game:service("Debris"):addItem(trail, 0.5)
        velocity.velocity = target.Position - torso.Position.unit * 80
        wait()
      end
      spin.Parent = nil
      transparent(0, player.Character)
      homing = false
      velocity.maxForce = Vector3.new(0, 100000, 0)
      velocity.velocity = Vector3.new(0, 50, 0)
      wait(0.2)
      velocity.Parent = nil
    else
       local originPosition = torso.Position
      lastTarget = nil
      velocity.maxForce = Vector3.new(100000, 100000, 100000)
      velocity.Parent = torso
      for i = 1, 14 do
        if torso.Position.y - originPosition.magnitude > 14 or checkSit() == true then
          break
        end
        spin.CFrame = torso.CFrame * CFrame.fromEulerAnglesXYZ(-1 * i, 0, 0)
        if spin.Parent == nil then
          spin.Parent = player.Character
        end
        local trail = spin:clone()
        trail.Transparency = 0.8
        trail.TopSurface = 0
        trail.BottomSurface = 0
        trail.CFrame = spin.CFrame
        trail.Parent = player.Character
        mesh = Instance.new("SpecialMesh")
        mesh.Parent = trail
        mesh.Scale = Vector3.new(0.04, 0.04, 0.04)
        mesh.MeshId = "rbxassetid://464790010"
        mesh.TextureId = "rbxassetid://484181635"
        mesh.Offset = Vector3.new(0, -0.5, 0)
        game:service("Debris"):addItem(trail, 1)
        velocity.velocity = torso.CFrame.lookVector * 50
        wait()
      end
      velocity.Parent = nil
      spin.Parent = nil
    
      wait(0.25)
      homing = false
    end
  end
end
if mouse == nil then
  return
end
if player:FindFirstChild("Message") ~= nil then
  player.Message.Parent = nil
end
hint.Parent = player
mouse.KeyDown:Connect(onButton1Down)
mouse.KeyUp:Connect(onButton1Up)
mouse.KeyDown:Connect(onKeyDown)
mouse.Move:Connect(function()
  if player.Character:FindFirstChild("Torso") ~= nil then
    direction = mouse.Hit.p - player.Character:FindFirstChild("Torso").Position.unit
    direction = Vector3.new(direction.x, 0, direction.z)
  end
end)