Sound

Sound is one of the most important but often neglected pieces of game design. Good sound design can add a huge amount of juice to your game for a very small amount of effort. Sounds can give the player feedback, connect them emotionally to the characters, or even be a part of the gameplay.

For this game, you're going to add three sound effects. In the Main scene, add three AudioStreamPlayer nodes and name them CoinSound, LevelSound, and EndSound. Drag each sound from the audio folder (you can find it under assets in the FileSystem dock) into the corresponding Stream property of each node.

To play a sound, you call the play() function on it. Add $CoinSound.play() to the _on_Player_pickup() function, $EndSound.play() to the game_over() function, and $LevelSound.play() to the spawn_coins() function.