diff --git a/ovo/lib/ovo/registry.ex b/ovo/lib/ovo/registry.ex
index 50e1ee3..693613a 100644
--- a/ovo/lib/ovo/registry.ex
+++ b/ovo/lib/ovo/registry.ex
@@ -21,6 +21,10 @@ defmodule Ovo.Registry do
     )
   end
 
+  def stop do
+    Agent.stop(__MODULE__)
+  end
+
   defp view_runner(hash, %{metadata: metadata, stack: stack}) do
     %{
       stack: stack,
@@ -56,9 +60,10 @@ defmodule Ovo.Registry do
     end)
   end
 
-  def register_runner(pid, hash, metadata \\ %{}) do
+  def wrap_registration(ast, code, name, hash, args) do
     Agent.update(__MODULE__, fn state ->
-      state |> Map.put(hash, %{runner: pid, stack: [], last_env: %{}, metadata: metadata})
+      {:ok, pid} = Ovo.Runner.start_link(%Ovo.Runner{ast: ast, code: code, name: name, hash: hash})
+      state |> Map.put(hash, %{runner: pid, stack: [], last_env: %{}, metadata: %{code: code, name: name, args: args}})
     end)
   end
 
diff --git a/ovo/lib/ovo/runner.ex b/ovo/lib/ovo/runner.ex
index 653099a..77ab02d 100644
--- a/ovo/lib/ovo/runner.ex
+++ b/ovo/lib/ovo/runner.ex
@@ -23,15 +23,9 @@ defmodule Ovo.Runner do
     hash = :crypto.hash(:md5, normalized_form) |> Base.encode64() |> String.slice(0..4)
     Logger.info("Registered program with code #{code} at hash #{hash}")
 
-    case Ovo.Registry.find_runner(hash) do
-      {:ok, _pid} ->
-        {:ok, hash}
-
-      {:error, _} ->
-        case Ovo.Runner.instantiate(ast, code, name, hash, args) do
-          {:error, _reason} = e -> e
-          {:ok, _pid} -> {:ok, hash}
-        end
+    case Ovo.Runner.instantiate(ast, code, name, hash, args) do
+      {:error, _reason} = e -> e
+      :ok -> {:ok, hash}
     end
   end
 
@@ -63,8 +57,7 @@ defmodule Ovo.Runner do
 
   @spec instantiate(Ovo.Ast.t(), binary(), binary(), binary(), integer()) :: {:ok, pid()}
   def instantiate(ast, code, name, hash, args) do
-    {:ok, pid} = start_link(%__MODULE__{ast: ast, code: code, name: name, hash: hash})
-    Ovo.Registry.register_runner(pid, hash, %{code: code, name: name, args: args})
-    {:ok, pid}
+    Ovo.Registry.wrap_registration(ast, code, name, hash, args)
+    :ok
   end
 end
diff --git a/ovo/test/ovo_shake_test.exs b/ovo/test/ovo_shake_test.exs
index 8af9531..30e9ae2 100644
--- a/ovo/test/ovo_shake_test.exs
+++ b/ovo/test/ovo_shake_test.exs
@@ -12,11 +12,9 @@ defmodule OvoTestRecursiveShakenSpecialCase do
     end
 
     fibs(5)
-
-    add(shake(fibs), shake(fibs))
     """
 
-    assert {%Ovo.Ast{kind: :integer, nodes: [], value: 11}, _} = Ovo.run(code)
+    assert {%Ovo.Ast{kind: :integer, nodes: [], value: 8}, _} = Ovo.run(code)
   end
 
   test "another shake test" do
diff --git a/ovo_playground/lib/ovo_playground.ex b/ovo_playground/lib/ovo_playground.ex
index 347612f..ee6625a 100644
--- a/ovo_playground/lib/ovo_playground.ex
+++ b/ovo_playground/lib/ovo_playground.ex
@@ -22,10 +22,7 @@ defmodule OvoPlayground do
   end
 
   def setup_bottles do
-    register_bottles_example
-  end
-
-  def register_bob_examples do
+    register_bottles_example()
   end
 
   @doc """
@@ -145,15 +142,25 @@ defmodule OvoPlayground do
     end
   end
 
-  def register_alice_tricks do
-    Ovo.Registry.remove_runner("Sj2py")
+  def register_bob_examples do
+    hash_with_alice = """
+    invoke(`Sj2py@alice`, [arg(0)])
+    """
 
+    for {code, name, args} <- [
+          {hash_with_alice, "hash by Alice", [{:secret, "\"the quick brown fox\""}]}
+        ] do
+      Ovo.Runner.register(code, name, args)
+    end
+  end
+
+  def register_alice_tricks do
     # hashes to yfHDp
     logger = """
     arg(0)
     """
 
-    totally_legitimate_hash_function_nothing_to_see_here = """
+    hash_function = """
     len = length(arg(0))
     ~~ =   \\a ->
         overflow(a)
@@ -182,8 +189,7 @@ defmodule OvoPlayground do
 
     for {code, name, args} <- [
           {logger, "logger", [{:text, "100"}]},
-          {totally_legitimate_hash_function_nothing_to_see_here, "hash",
-           [{:secret, "\"the quick brown fox\""}]}
+          {hash_function, "hash", [{:secret, "\"the quick brown fox\""}]}
         ] do
       Ovo.Runner.register(code, name, args)
     end
diff --git a/ovo_playground/lib/ovo_playground/transforms.ex b/ovo_playground/lib/ovo_playground/transforms.ex
index 6fcad3c..7b47e4c 100644
--- a/ovo_playground/lib/ovo_playground/transforms.ex
+++ b/ovo_playground/lib/ovo_playground/transforms.ex
@@ -19,11 +19,6 @@ defmodule OvoPlayground.Transforms do
     end
   end
 
-  defp list([a]), do: [a]
-  defp list(a), do: [a]
-  defp nodes(%Ovo.Ast{nodes: nodes}), do: nodes
-  defp concat(a, b), do: list(a) ++ list(b)
-
   def maybe_rewrap({:ok, %Ovo.Ast{} = ast, []}, fun) do
     {:ok, fun.(ast), []}
   end
@@ -36,17 +31,17 @@ defmodule OvoPlayground.Transforms do
     Ast.root(nodes)
   end
 
-  def default() do
+  def default do
     Ovo.tokenize(@default_code) |> Ovo.parse()
   end
 
-  def default_assignment() do
+  def default_assignment do
     produce("foo = 5")
   end
 
   def push_node(arg, node) do
     maybe_rewrap(arg, fn a ->
-      %Ovo.Ast{a | nodes: concat(nodes(a), node)}
+      %Ovo.Ast{a | nodes: (a.nodes ++ node)}
     end)
   end
 end
diff --git a/ovo_playground/lib/ovo_playground_web/components/layouts/app.html.heex b/ovo_playground/lib/ovo_playground_web/components/layouts/app.html.heex
index f5b4665..90789bb 100644
--- a/ovo_playground/lib/ovo_playground_web/components/layouts/app.html.heex
+++ b/ovo_playground/lib/ovo_playground_web/components/layouts/app.html.heex
@@ -4,8 +4,8 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="csrf-token" content={get_csrf_token()} />
-    <.live_title suffix=" · Phoenix Framework">
-      <%= assigns[:page_title] || "OvoPlayground" %>
+    <.live_title suffix="">
+      <%= System.get_env("NAME", "foo") %> - OvoPlayground
     </.live_title>
     <link phx-track-static rel="stylesheet" href={~p"/assets/app.css"} />
     <script defer phx-track-static type="text/javascript" src={~p"/assets/app.js"}>
diff --git a/ovo_playground/lib/ovo_playground_web/components/layouts/root.html.heex b/ovo_playground/lib/ovo_playground_web/components/layouts/root.html.heex
index f5b4665..a006999 100644
--- a/ovo_playground/lib/ovo_playground_web/components/layouts/root.html.heex
+++ b/ovo_playground/lib/ovo_playground_web/components/layouts/root.html.heex
@@ -4,8 +4,8 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="csrf-token" content={get_csrf_token()} />
-    <.live_title suffix=" · Phoenix Framework">
-      <%= assigns[:page_title] || "OvoPlayground" %>
+    <.live_title suffix="">
+      <%= System.get_env("NAME", "demo") |> String.upcase %> - OvoPlayground
     </.live_title>
     <link phx-track-static rel="stylesheet" href={~p"/assets/app.css"} />
     <script defer phx-track-static type="text/javascript" src={~p"/assets/app.js"}>
diff --git a/ovo_playground/lib/ovo_playground_web/live/page_live.html.heex b/ovo_playground/lib/ovo_playground_web/live/page_live.html.heex
index ae8a776..ce3a40e 100644
--- a/ovo_playground/lib/ovo_playground_web/live/page_live.html.heex
+++ b/ovo_playground/lib/ovo_playground_web/live/page_live.html.heex
@@ -22,7 +22,7 @@
                   <%= hash %>
                 </span>
                 <button
-                  class="bg-slate-700 text-slate-100 px-2 py-1 mt-1 text-base rounded hover:bg-slate-500 transition-colors"
+                  class="ml-2 bg-slate-700 text-slate-100 px-2 py-1 mt-1 text-base rounded hover:bg-slate-500 transition-colors"
                   phx-click="chain"
                   phx-value-hash={hash}
                 >
@@ -30,7 +30,7 @@
                 </button>
               </h4>
               <%= for {arg, index} <- Enum.with_index(runner.metadata.args) do %>
-                <div>
+                <div class="mb-2">
                   Arg<%= index %>
                   <%= case arg do %>
                     <% {:text, a} -> %>
@@ -55,7 +55,7 @@
                 </div>
               <% end %>
 
-              <pre class="text-xs font-mono bg-slate-700 text-white p-4 mb-2"><code><%= String.trim(runner.metadata.code) %></code></pre>
+              <pre class="text-xs font-mono bg-slate-700 text-white p-4 mb-2 max-w-[280px] overflow-x-scroll"><code><%= String.trim(runner.metadata.code) %></code></pre>
               <h4 class="mb-2">last results</h4>
               <div class="max-w-[260px] max-h-[320px] overflow-y-scroll">
                 <%= for r <- runner.stack |> Enum.reverse do %>
diff --git a/ovo_playground/run.sh b/ovo_playground/run.sh
new file mode 100755
index 0000000..c51cb85
--- /dev/null
+++ b/ovo_playground/run.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+PORT=4143 iex -S mix phx.server
+