   }

            static addListeners() {
                this.ui.audioButton.events.on('update', this.onAudio);
                document.addEventListener('dblclick', this.preventZoom);
                window.addEventListener('resize', this.onResize);
                ticker.add(this.onUpdate);
                ticker.start();
            }

            // Event handlers

            static preventZoom = e => {
                e.preventDefault();
            };

            static onAudio = ({ sound }) => {
 