diff --git a/src/Forms/MainForm.cs b/src/Forms/MainForm.cs
index 466951d..5637ba7 100644
--- a/src/Forms/MainForm.cs
+++ b/src/Forms/MainForm.cs
@@ -284,6 +284,11 @@ private void glControl1_Load(object sender, EventArgs e)
             GL.Enable(EnableCap.Texture2D);
             GL.Enable(EnableCap.AlphaTest);
             GL.AlphaFunc(AlphaFunction.Gequal, 0.5f);
+            
+            if (Globals.doBackfaceCulling)
+                GL.Enable(EnableCap.CullFace);
+            else
+                GL.Disable(EnableCap.CullFace);
         }
 
         private void glControl1_Resize(object sender, EventArgs e)
@@ -296,7 +301,9 @@ private void glControl1_Resize(object sender, EventArgs e)
         
         private void loadROMToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            loadROM(false);
+            DialogResult saveResult = Prompts.ShowShouldSaveDialog();
+            if(saveResult != DialogResult.Cancel)
+                loadROM(false);
         }
 
         private void saveROMAsToolStripMenuItem_Click(object sender, EventArgs e)
@@ -526,16 +533,25 @@ private void selectLeveToolStripMenuItem_Click(object sender, EventArgs e)
             if (newLevel.changeLevel)
             {
                 //Console.WriteLine("Changing Level to " + newLevel.levelID);
-                level = new Level(newLevel.levelID, 1);
-                camera.setCameraMode(CameraMode.FLY, ref camMtx);
-                camera.setLevel(level);
-                LevelScripts.parse(ref level, 0x15, 0);
-                level.sortAndAddNoModelEntries();
-                level.CurrentAreaID = level.Areas[0].AreaID;
-                resetObjectVariables();
-                refreshObjectsInList();
-                glControl1.Invalidate();
-                updateAreaButtons();
+                Level testLevel = new Level(newLevel.levelID, 1);
+                LevelScripts.parse(ref testLevel, 0x15, 0);
+                if (testLevel.Areas.Count > 0)
+                {
+                    level = testLevel;
+                    camera.setCameraMode(CameraMode.FLY, ref camMtx);
+                    camera.setLevel(level);
+                    level.sortAndAddNoModelEntries();
+                    level.CurrentAreaID = level.Areas[0].AreaID;
+                    resetObjectVariables();
+                    refreshObjectsInList();
+                    glControl1.Invalidate();
+                    updateAreaButtons();
+                }
+                else
+                {
+                    ushort id = newLevel.levelID;
+                    MessageBox.Show("Error: No areas found in level ID: 0x" + id.ToString("X"));
+                }
             }
         }
 
@@ -679,6 +695,7 @@ private void propertyGrid1_PropertyValueChanged(object s, PropertyValueChangedEv
                     ((WarpInstant)warp).updateROMData();
                 }
             }
+            Globals.needToSave = true;
         }
 
         // I never want CategorizedAlphabetical, so I change it back to Categorized if detected.
@@ -892,6 +909,7 @@ private void moveObj_MouseMove(object sender, MouseEventArgs e)
                     glControl1.Invalidate();
                     propertyGrid1.Refresh();
                     glControl1.Update(); // Needed after calling propertyGrid1.Refresh();
+                    Globals.needToSave = true;
                 }
             }
         }
@@ -929,6 +947,7 @@ private void movObj_UpDown_MouseMove(object sender, MouseEventArgs e)
                     propertyGrid1.Refresh();
                     glControl1.Update(); // Needed after calling propertyGrid1.Refresh();
                     moveObj_UpDown_lastMouseY = e.Y;
+                    Globals.needToSave = true;
                 }
             }
         }
@@ -996,6 +1015,7 @@ private void rotObj_MouseMove(object sender, MouseEventArgs e)
                     glControl1.Invalidate();
                     propertyGrid1.Refresh();
                     glControl1.Update(); // Needed after calling propertyGrid1.Refresh();
+                    Globals.needToSave = true;
                 }
             }
         }
@@ -1020,6 +1040,7 @@ private void dropObjectToGround()
                 glControl1.Invalidate();
                 propertyGrid1.Refresh();
                 glControl1.Update(); // Needed after calling propertyGrid1.Refresh();
+                Globals.needToSave = true;
             }
         }
 
@@ -1035,6 +1056,15 @@ private void AreaButton_Click(object sender, EventArgs e)
             trySwitchArea(area);
         }
 
+        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            if (Globals.needToSave)
+            {
+                DialogResult saveResult = Prompts.ShowShouldSaveDialog();
+                e.Cancel = (saveResult == DialogResult.Cancel);
+            }
+        }
+
         bool rotObj_Yaw_mouseDown = false;
         int rotObj_Yaw_lastMouseY = 0;
         private void rotObj_Yaw_MouseDown(object sender, MouseEventArgs e)
@@ -1074,6 +1104,7 @@ private void rotObj_Yaw_MouseMove(object sender, MouseEventArgs e)
                     propertyGrid1.Refresh();
                     glControl1.Update(); // Needed after calling propertyGrid1.Refresh();
                     rotObj_Yaw_lastMouseY = e.Y;
+                    Globals.needToSave = true;
                 }
             }
         }
diff --git a/src/LevelInfo/Object3D.cs b/src/LevelInfo/Object3D.cs
index 8867010..f419c6a 100644
--- a/src/LevelInfo/Object3D.cs
+++ b/src/LevelInfo/Object3D.cs
@@ -251,7 +251,7 @@ public void updateROMData()
             else if (Globals.list_selected == 1) // Macro Object
             {
                 //Console.WriteLine("Preset ID = 0x" + presetID.ToString("X"));
-                ushort first = (ushort)((ushort)((yRot << 9) / 2.8125f) | (presetID & 0x1FF));
+                ushort first = (ushort)((((ushort)(yRot / 2.8125f) & 0x7F) << 9) | (presetID & 0x1FF));
                 rom.writeHalfword(romAddr, first);
                 rom.writeHalfword(romAddr + 2, xPos);
                 rom.writeHalfword(romAddr + 4, yPos);