fix sound

public/phaser-harkat/phaser-udemy/state3.js

@@ -5,7 +5,7 @@ demo.state3.prototype = {
         game.load.image('button2', 'assets/sprites/rakenus_apustus.jpg');
         game.load.image('button3', 'assets/sprites/täräntänkö.jpg');
         
-        game.load.audio('pops', 'assets/sounds/audio.wav');
+        game.load.audio('pops', 'assets/sounds/audio.mp3');
     },
     create: function(){
         game.stage.backgroundColor = '#32f532';