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Finishing up
We have now completed all the functionality for our game. Below are some remaining steps to add a bit more "juice" to improve the game experience.
Feel free to expand the gameplay with your own ideas.
Background
The default gray background is not very appealing, so let's change its color.
One way to do this is to use a `ColorRect` node. Make it
the first node under `Main` so that it will be drawn behind the other nodes.
`ColorRect` only has one property: `Color`. Choose a color you like and
select "Layout" -> "Full Rect" so that it covers the screen.
You could also add a background image, if you have one, by using a
`TextureRect` node instead.
Sound effects
Sound and music can be the single most effective way to add appeal to the game experience. In your game assets folder, you have two sound files: "House In a Forest Loop.ogg" for background music, and "gameover.wav" for when the player loses.
Add two AudioStreamPlayer nodes as children of
Main. Name one of them Music and the other DeathSound. On each one,
click on the Stream property, select "Load", and choose the corresponding
audio file.
To play the music, add $Music.play() in the new_game() function and
$Music.stop() in the game_over() function.
Finally, add $DeathSound.play() in the game_over() function.
Keyboard shortcut
Since the game is played with keyboard controls, it would be convenient if we
could also start the game by pressing a key on the keyboard. We can do this with
the "Shortcut" property of the `Button` node.
In a previous lesson, we created four input actions to move the character. We
will create a similar input action to map to the start button.
Select "Project" -> "Project Settings" and then click on the "Input Map"
tab. In the same way you created the movement input actions, create a new
input action called `start_game` and add a key mapping for the :kbd:`Enter`
key.
In the `HUD` scene, select the `StartButton` and find its *Shortcut*
property in the Inspector. Select "New Shortcut" and click on the "Shortcut"
item. A second *Shortcut* property will appear. Select "New InputEventAction"
and click the new "InputEventAction". Finally, in the *Action* property, type
the name `start_game`.
Now when the start button appears, you can either click it or press :kbd:`Enter`
to start the game.
And with that, you completed your first 2D game in Godot.
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 `doc_your_first_3d_game` to learn
to create a complete 3D game from scratch, in Godot.