ADD TO Preloader.js :::

--preload
this.load.audio('explosion_audio', 'audio/explosion.mp3');
this.load.audio('hurt_audio', 'audio/hurt.mp3');
this.load.audio('select_audio', 'audio/select.mp3');
this.load.audio('game_audio', 'audio/bgm.mp3');

-- update[wrap]
if(this.cache.isSoundDecoded('game_audio') && this.ready == false) {}



ADD TO Game.js
this.music;
this.ouch;
this.boom;
this.ding;


-- create
this.music = this.add.audio('game_audio');
this.music.play('', 0, 0.3, true);   //marker, position, volume, loop
this.ouch = this.add.audio('hurt_audio');
this.boom = this.add.audio('explosion_audio');
this.ding = this.add.audio('select_audio');

-- fireBurst [in conditional]
this.boom.play();
this.boom.volume = 0.2;

-- bunnyCollision
this.ouch.play();

-- friendlyFire
this.ouch.play();

-- checkBunniesLeft
[if 0]
this.music.stop();

-- quitGame
this.ding.play();


ADD to StartMenu.js
this.ding;

-- create
this.ding = this.add.audio('select_audio');

-- startGame
this.ding.play();