Fix menus between floors

Zennysoft.Game.Ma/src/menu/MainMenu.cs

@@ -10,6 +10,8 @@ public interface IMainMenu : IControl
   event MainMenu.NewGameEventHandler NewGame;
   event MainMenu.LoadGameEventHandler LoadGame;
   event MainMenu.QuitEventHandler Quit;
+
+  void FadeIn();
 }
 
 [Meta(typeof(IAutoNode))]
@@ -38,6 +40,12 @@ public partial class MainMenu : Control, IMainMenu
     NewGameButton.GrabFocus();
   }
 
+  public void FadeIn()
+  {
+    NewGameButton.GrabFocus();
+    Show();
+  }
+
   public void OnExitTree()
   {
     NewGameButton.Pressed -= OnNewGamePressed;

Zennysoft.Game.Ma/src/menu/MainMenu.tscn

@@ -11,6 +11,15 @@ grow_horizontal = 2
 grow_vertical = 2
 script = ExtResource("1_y6722")
 
+[node name="ColorRect" type="ColorRect" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0.137255, 0.121569, 0.12549, 1)
+
 [node name="MarginContainer" type="MarginContainer" parent="."]
 layout_mode = 1
 anchors_preset = 15