SongSelect: Add ura difficulty

public/src/js/soundbuffer.js

@@ -2,11 +2,7 @@
 	constructor(){
 		var AudioContext = window.AudioContext || window.webkitAudioContext
 		this.context = new AudioContext()
-		pageEvents.once(window, "click").then(() => {
-			if(this.context.state === "suspended"){
-				this.context.resume()
-			}
-		})
+		pageEvents.add(window, ["click", "touchend"], this.pageClicked.bind(this))
 	}
 	load(url, gain){
 		return loader.ajax(url, request => {
@@ -48,6 +44,11 @@
 		source.connect(sound.gain.gainNode || this.context.destination)
 		return source
 	}
+	pageClicked(){
+		if(this.context.state === "suspended"){
+			this.context.resume()
+		}
+	}
 }
 class SoundGain{
 	constructor(soundBuffer, channel){