Add outros and transition text at the end of first_2d_game lessons

getting_started/first_2d_game/02.player_scene.rst

@@ -3,6 +3,9 @@
 Creating the player scene
 =========================
 
+With the project settings in place, we can start working on the
+player-controlled character.
+
 The first scene will define the ``Player`` object. One of the benefits of
 creating a separate Player scene is that we can test it separately, even before
 we've created other parts of the game.
@@ -91,3 +94,7 @@ When you're finished, your ``Player`` scene should look like this:
 .. image:: img/player_scene_nodes.png
 
 Make sure to save the scene again after these changes.
+
+In the next part, we'll add a script to the player node to move and animate it.
+Then, we'll set up collision detection to know when the player got hit by
+something.

getting_started/first_2d_game/03.coding_the_player.rst

@@ -389,3 +389,5 @@ starting a new game.
         Show();
         GetNode<CollisionShape2D>("CollisionShape2D").Disabled = false;
     }
+
+With the player working, we'll work on the enemy in the next lesson.

getting_started/first_2d_game/04.creating_the_enemy.rst

@@ -134,3 +134,7 @@ add this code:
     }
 
 This completes the `Mob` scene.
+
+With the player and enemies ready, in the next part, we'll bring them together
+in a new scene. We'll make enemies spawn randomly around the game board and move
+forward, turning our project into a playable game.

getting_started/first_2d_game/05.the_main_game_scene.rst

@@ -283,3 +283,6 @@ player disappear when hit by a mob.
 
 When you're sure everything is working, remove the call to ``new_game()`` from
 ``_ready()``.
+
+What's our game lacking? Some user interface. In the next lesson, we'll add a
+title screen and display the player's score.

getting_started/first_2d_game/06.heads_up_display.rst

@@ -304,3 +304,6 @@ the ``new_game()`` function in ``Main``:
 
 The ``call_group()`` function calls the named function on every node in a
 group - in this case we are telling every mob to delete itself.
+
+The game's mostly done at this point. In the next and last part, we'll polish it
+a bit by adding a background, looping music, and some keyboard shortcuts.

getting_started/first_2d_game/07.finishing-up.rst

@@ -56,3 +56,17 @@ spacebar.
 
 Now when the start button appears, you can either click it or press :kbd:`Space`
 to start the game.
+
+And with that, you completed your first 2D game in Godot.
+
+.. image:: img/dodge_preview.gif
+
+You got to make a player-controlled character, enemies that spawn randomly
+around the game board, count the score, implement a game over and replay, user
+interface, sounds, and more. Congratulations!
+
+There's still much to learn, but you can take a moment to appreciate what you
+achieved.
+
+And when you're ready, you can move on to :ref:`doc_your_first_3d_game` to learn
+to create a complete 3D game from scratch, in Godot.

getting_started/first_3d_game/index.rst

@@ -1,3 +1,5 @@
+.. _doc_your_first_3d_game:
+
 Your first 3D game
 ==================