diff --git a/dotscape b/dotscape
new file mode 100755
index 0000000..b9477e1
Binary files /dev/null and b/dotscape differ
diff --git a/dotscape.mlb b/dotscape.mlb
index 064d455..170d04c 100644
--- a/dotscape.mlb
+++ b/dotscape.mlb
@@ -1,5 +1,6 @@
 $(SML_LIB)/basis/basis.mlb
 
+(* FUNCTIONAL CORE *)
 ann
   "allowVectorExps true"
 in
@@ -23,3 +24,26 @@ functional-core/app-with.sml
 message-types/input-msg.sml
 message-types/draw-msg.sml
 functional-core/app-update.sml
+
+(* IMPERATIVE SHELL *)
+$(SML_LIB)/basis/mlton.mlb
+$(SML_LIB)/cml/cml.mlb
+
+ann
+  "allowFFI true"
+in
+  ffi/gles3-import.sml
+  ffi/glfw-import.sml
+  ffi/glfw-input.sml
+end
+
+ann
+  "allowVectorExps true"
+in
+  imperative-shell/constants.sml
+  imperative-shell/app-draw.sml
+end
+
+imperative-shell/input-callbacks.sml
+imperative-shell/event-loop.sml
+imperative-shell/shell.sml
diff --git a/ffi/export.h b/ffi/export.h
index c1080ad..a697dec 100644
--- a/ffi/export.h
+++ b/ffi/export.h
@@ -157,6 +157,9 @@ typedef Pointer Objptr;
 extern "C" {
 #endif
 
+MLLIB_PUBLIC(void mltonMouseMoveCallback (Real32 x0, Real32 x1);)
+MLLIB_PUBLIC(void mltonMouseClickCallback (Int32 x0, Int32 x1);)
+MLLIB_PUBLIC(void mltonFramebufferSizeCallback (Int32 x0, Int32 x1);)
 
 #undef MLLIB_PRIVATE
 #undef MLLIB_PUBLIC
diff --git a/functional-core/app-init.sml b/functional-core/app-init.sml
index 647ef75..c762cb6 100644
--- a/functional-core/app-init.sml
+++ b/functional-core/app-init.sml
@@ -1,6 +1,6 @@
-signature APP_INIT = 
+signature APP_INIT =
 sig
-  val fromWidthAndHeight : int * int -> AppType.app_type
+  val fromWindowWidthAndHeight: int * int -> AppType.app_type
 end
 
 structure AppInit :> APP_INIT =
@@ -26,7 +26,7 @@ struct
       }
     end
 
-  fun fromWidthAndHeight (windowWidth, windowHeight) =
+  fun fromWindowWidthAndHeight (windowWidth, windowHeight) =
     if windowWidth = windowHeight then
       helpFromWidthAndHeight
         (windowWidth, windowHeight, 0, windowWidth, 0, windowHeight)
diff --git a/imperative-shell/event-loop.sml b/imperative-shell/event-loop.sml
index 1e781e9..f81f0bd 100644
--- a/imperative-shell/event-loop.sml
+++ b/imperative-shell/event-loop.sml
@@ -15,13 +15,7 @@ struct
       end
   in
     fun update (inputMailbox, drawMailbox, initial) =
-      loop
-        ( inputMailbox
-        , drawMailbox
-        , 0.0
-        , 0.0
-        , AppType.getInitial (Constants.windowWidth, Constants.windowHeight)
-        )
+      loop (inputMailbox, drawMailbox, 0.0, 0.0, initial)
   end
 
   fun draw
@@ -100,14 +94,11 @@ struct
            | RESIZE_TRIANGLES_BUTTONS_AND_GRAPH {triangles, graphLines} =>
                let
                  val _ =
-                   AppDraw.uploadTrianglesVector
-                     (triangleDrawObject, triangles)
+                   AppDraw.uploadTrianglesVector (triangleDrawObject, triangles)
                  val triangleDrawLength = Vector.length triangles div 2
-               (* buttons are reset by setting buttonDrawLength to 0 *)
-                 val _ =
-                   AppDraw.uploadGraphLines
-                    (graphDrawObject, graphLines)
-                  val drawGraphLength = Vector.length graphLines div 2
+                 (* buttons are reset by setting buttonDrawLength to 0 *)
+                 val _ = AppDraw.uploadGraphLines (graphDrawObject, graphLines)
+                 val drawGraphLength = Vector.length graphLines div 2
                in
                  draw
                    ( drawMailbox
diff --git a/imperative-shell/shell.sml b/imperative-shell/shell.sml
index 3eaa2e1..017925b 100644
--- a/imperative-shell/shell.sml
+++ b/imperative-shell/shell.sml
@@ -15,12 +15,18 @@ struct
       val _ = Glfw.makeContextCurrent window
       val _ = Gles3.loadGlad ()
 
-      val initialModel = AppType.getInitial (Constants.windowWidth, Constants.windowHeight)
+      val initialModel =
+        AppInit.fromWindowWidthAndHeight
+          (Constants.windowWidth, Constants.windowHeight)
 
-      val graphLines = #graphLines initialModel
+      val graphLines = 
+        let
+          open AppType
+        in
+          #graphLines initialModel
+        end
       val graphDrawObject = AppDraw.initGraphLines ()
-      val _ =
-        AppDraw.uploadGraphLines (graphDrawObject, graphLines)
+      val _ = AppDraw.uploadGraphLines (graphDrawObject, graphLines)
 
       val buttonDrawObject = AppDraw.initButton ()
       val triangleDrawObject = AppDraw.initTriangles ()
@@ -30,8 +36,8 @@ struct
 
       val _ = CML.spawn (fn () =>
         InputCallbacks.registerCallbacks (window, inputMailbox))
-      val _ = CML.spawn 
-        (fn () => EventLoop.update (inputMailbox, drawMailbox, initialModel))
+      val _ = CML.spawn (fn () =>
+        EventLoop.update (inputMailbox, drawMailbox, initialModel))
       val _ = CML.spawn (fn () =>
         EventLoop.draw
           ( drawMailbox