Implement basic AttractState.

source/funkin/ui/title/AttractState.hx

@@ -0,0 +1,24 @@
+package funkin.ui.title;
+
+/**
+ * After about 2 minutes of inactivity on the title screen,
+ * the game will enter the Attract state, as a reference to physical arcade machines.
+ *
+ * In the current version, this just plays the Kickstarter trailer, but this can be changed to
+ * gameplay footage, a generic game trailer, or something more elaborate.
+ */
+class AttractState extends MusicBeatState
+{
+  static final ATTRACT_VIDEO_PATH:String = Paths.videos('kickstarterTrailer.mp4');
+
+  public override function create():Void {}
+
+  /**
+   * When the attraction state ends (after the video ends or the user presses any button),
+   * switch immediately to the title screen.
+   */
+  function onAttractEnd():Void
+  {
+    FlxG.switchState(new TitleState());
+  }
+}

source/funkin/ui/title/TitleState.hx

@@ -192,8 +192,14 @@ class TitleState extends MusicBeatState
     else
       initialized = true;
 
+    if (FlxG.sound.music != null) FlxG.sound.music.onComplete = moveToAttract;
   }
 
+  /**
+   * After sitting on the title screen for a while, transition to the attract screen.
+   */
+  function moveToAttact():Void {}
+
   function playMenuMusic():Void
   {
     if (FlxG.sound.music == null || !FlxG.sound.music.playing)