Add music handler

level/Level.js

@@ -106,6 +106,10 @@ Level = function(levelName) {
 			level.stage.addChild(tint);
 		}
 		level.stage.addChild(wipe);
+		
+		if (level.map.music && level.map.music != "none" && level.map.music != Music.current) {
+			Music.play(level.map.music);
+		}
 	}
 	
 	level.think = function() {

main/Game.js

@@ -6,6 +6,8 @@ Game = (function() {
 	Game.init = function(callback) {
 		Renderer.init(initScene);
 		
+		Music.init();
+		
 		function initScene() {
 			// Run callback to set the inital scene.
 			callback();
@@ -36,6 +38,7 @@ Game = (function() {
 	function flipScenes() {
 		if (currentScene != incomingScene) {
 			currentScene.end();
+			currentScene.stage.destroy();
 			incomingScene.init();
 			currentScene = incomingScene;
 		}

main/Music.js

@@ -0,0 +1,56 @@
+Music = (function() {
+	var S = createjs.Sound;
+	var Music = {};
+	
+	var musics = [
+		"ocean",
+		"boss",
+	];
+	
+	Music.init = function() {
+		musics.forEach(function(m) {
+			S.registerSound("assets/music/" + m + ".ogg", "M_" + m);
+		});
+	}
+	
+	var currentMusic;
+	
+	Music.play = function(name, noloop) {
+		if (currentMusic) {
+			currentMusic.stop();
+			currentMusic.destroy();
+		}
+		
+		Music.current = name;
+		currentMusic = S.play("M_" + name, {interrupt: createjs.Sound.INTERRUPT_ANY, loop: noloop ? 0 : -1});
+	}
+	
+	Music.fadeout = function(time) {
+		if (!currentMusic) {
+			return;
+		}
+		
+		var m = currentMusic;
+		
+		fade();
+	
+		function fade() {
+			if (m != currentMusic) {
+				return;
+			}
+			
+			if (currentMusic.volume <= 0) {
+				currentMusic.stop();
+				currentMusic.destroy();
+				
+				return;
+			}
+			
+			currentMusic.volume -= 1/16;
+			
+			window.setTimeout(fade, time/16);
+		}
+	}
+	
+	return Music;
+})();