diff --git a/lib/lytlang.xrl b/lib/lytlang.xrl
new file mode 100644
index 0000000..673d07e
--- /dev/null
+++ b/lib/lytlang.xrl
@@ -0,0 +1,12 @@
+%% number
+[0-9]+      : {token,
+							 { number,
+								 TokenLine,
+								 list_to_integer(TokenChars)
+							 }
+							}.
+%% left paren
+\(          : {token, {'(', TokenLine}}.
+%% ... other tokens
+%% skip white spaces
+[\s\n\r\t]+ : skip_token.
diff --git a/lib/transpiler.ex b/lib/transpiler.ex
index b83acbc..7806d4a 100644
--- a/lib/transpiler.ex
+++ b/lib/transpiler.ex
@@ -56,10 +56,10 @@ defmodule Lytlang.Transpiler do
     state =
       case line_tokens do
         ["!mod", module_name | rest] ->
-          %{state | ast: [{:module, String.to_atom(module_name), []} | ast]}
+          %{state | ast: [{:module, module_name, []} | ast]}
 
         ["fn", fn_name | rest] ->
-          %{state | ast: [{:function, String.to_atom(fn_name), []} | ast]}
+          %{state | ast: [{:function, fn_name, []} | ast]}
 
         expr ->
           expr |> IO.inspect(label: "lyt expression")
@@ -77,8 +77,8 @@ defmodule Lytlang.Transpiler do
 
     case leaf do
       :global -> child.({"", ""}, state)
-      {:module, mod, []} -> child.({"defmodule #{to_string(mod)} do", "end"}, state)
-      {:fn, fname, []} -> child.({"def #{to_string(fname)} do", "end"}, state)
+      {:module, mod, []} -> child.({"defmodule #{mod} do", "end"}, state)
+      {:fn, fname, []} -> child.({"def #{fname} do", "end"}, state)
       expr when is_binary(expr) -> [expr]
     end
   end
@@ -88,6 +88,6 @@ defmodule Lytlang.Transpiler do
   end
 
   def tokenize(s) do
-    Regex.split(~r/\s/, s, true)
+    Regex.split(~r/\s/, s)
   end
 end
diff --git a/test/fixtures/example.lyt b/test/fixtures/example.lyt
index cca7230..f7e4338 100644
--- a/test/fixtures/example.lyt
+++ b/test/fixtures/example.lyt
@@ -1,5 +1,11 @@
 !mod Leetcode
 
+# Look, a comment!
+
+### part of the comment
+Look, a multiline comment!
+part of the comment ###
+
 @doc
 	LeetCode #1: two_sum
 
@@ -30,7 +36,9 @@ fn longest_non_repeating_substring s
 	s |> String.codepoints |> Enum.reduce {0 0 0 %{}} &ln3_reducer/2 |> elem 0
 
 fn ln3_new_least least map char
-	Map.has_key? map char ? max least ((Map.get map char) + 1) : least
+	Map.has_key? map char ::
+		true -> max least ((Map.get map char) + 1)
+		_ -> least
 
 fn ln3_reducer char {mx i least map}
 	least = ln3_new_least least map char
diff --git a/test/fixtures/example_projects/hello_world/hello_world.lyt b/test/fixtures/example_projects/hello_world/hello_world.lyt
new file mode 100644
index 0000000..b0d5558
--- /dev/null
+++ b/test/fixtures/example_projects/hello_world/hello_world.lyt
@@ -0,0 +1 @@
+"Hello, World!"
diff --git a/test/fixtures/example_projects/simple_app/app.lyt b/test/fixtures/example_projects/simple_app/app.lyt
new file mode 100644
index 0000000..392acbc
--- /dev/null
+++ b/test/fixtures/example_projects/simple_app/app.lyt
@@ -0,0 +1,24 @@
+mod SimpleApp
+entry
+	:project
+		deps:
+      {:cowboy, "~> 2.6"}
+      {:plug, "~> 1.8"}
+      {:plug_cowboy, "~> 2.0"}
+	:app
+		[extra_applications: [:logger]]
+
+import Plug.Conn
+
+fn init default_options
+	IO.puts "initializing plug"
+	default_options
+
+fn call conn:Plug.Conn.t() _options = []
+	IO.puts "calling plug"
+
+	conn
+	|> put_resp_content_type "text/plain"
+	|> send_resp 200 "Hello world"
+
+# in lytx run `Plug.Adapters.Cowboy.http SimpleApp []`