===================================================================
--- original.js
+++ change.js
@@ -1,79 +1,79 @@
-/****
+/**** 
 * Classes
 ****/
 // Firework particle class
 var FireworkParticle = Container.expand(function () {
-  var self = Container.call(this);
-  var particleGraphics = self.createAsset('fireworkParticle', 'Firework particle', 0.5, 0.5);
-  self.speedX = 0;
-  self.speedY = 0;
-  self.alpha = 1;
-  self.scaleX = 1;
-  self.scaleY = 1;
-  self.update = function () {
-    self.x += self.speedX;
-    self.y += self.speedY;
-    self.alpha *= 0.95; // fade out
-    self.scaleX *= 0.99;
-    self.scaleY *= 0.99;
-    if (self.alpha < 0.05) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var particleGraphics = self.createAsset('fireworkParticle', 'Firework particle', 0.5, 0.5);
+	self.speedX = 0;
+	self.speedY = 0;
+	self.alpha = 1;
+	self.scaleX = 1;
+	self.scaleY = 1;
+	self.update = function () {
+		self.x += self.speedX;
+		self.y += self.speedY;
+		self.alpha *= 0.98; // fade out more slowly
+		self.scaleX *= 0.99;
+		self.scaleY *= 0.99;
+		if (self.alpha < 0.05) {
+			self.destroy();
+		}
+	};
 });
 // Firework class
 var Firework = Container.expand(function () {
-  var self = Container.call(this);
-  self.particles = [];
-  self.explode = function (x, y) {
-    for (var i = 0; i < 50; i++) {
-      var particle = new FireworkParticle();
-      var angle = Math.random() * Math.PI * 2;
-      var speed = Math.random() * 5 + 2;
-      particle.speedX = Math.cos(angle) * speed;
-      particle.speedY = Math.sin(angle) * speed;
-      particle.x = x;
-      particle.y = y;
-      self.particles.push(particle);
-      game.addChild(particle);
-    }
-  };
-  self.update = function () {
-    for (var i = self.particles.length - 1; i >= 0; i--) {
-      self.particles[i].update();
-      if (self.particles[i].alpha < 0.05) {
-        self.particles.splice(i, 1);
-      }
-    }
-  };
+	var self = Container.call(this);
+	self.particles = [];
+	self.explode = function (x, y) {
+		for (var i = 0; i < 50; i++) {
+			var particle = new FireworkParticle();
+			var angle = Math.random() * Math.PI * 2;
+			var speed = Math.random() * 5 + 2;
+			particle.speedX = Math.cos(angle) * speed;
+			particle.speedY = Math.sin(angle) * speed;
+			particle.x = x;
+			particle.y = y;
+			self.particles.push(particle);
+			game.addChild(particle);
+		}
+	};
+	self.update = function () {
+		for (var i = self.particles.length - 1; i >= 0; i--) {
+			self.particles[i].update();
+			if (self.particles[i].alpha < 0.05) {
+				self.particles.splice(i, 1);
+			}
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background
+	backgroundColor: 0x000000 // Init game with black background
 });
 
-/****
+/**** 
 * Game Code
 ****/
 // Initialize fireworks array
 var fireworks = [];
 // Event listener for mouse or touch down
 game.on('down', function (obj) {
-  var event = obj.event;
-  var pos = event.getLocalPosition(game);
-  var firework = new Firework();
-  firework.explode(pos.x, pos.y);
-  fireworks.push(firework);
+	var event = obj.event;
+	var pos = event.getLocalPosition(game);
+	var firework = new Firework();
+	firework.explode(pos.x, pos.y);
+	fireworks.push(firework);
 });
 // Update function for the game
 LK.on('tick', function () {
-  for (var i = fireworks.length - 1; i >= 0; i--) {
-    fireworks[i].update();
-    if (fireworks[i].particles.length === 0) {
-      fireworks.splice(i, 1);
-    }
-  }
+	for (var i = fireworks.length - 1; i >= 0; i--) {
+		fireworks[i].update();
+		if (fireworks[i].particles.length === 0) {
+			fireworks.splice(i, 1);
+		}
+	}
 });
\ No newline at end of file