===================================================================
--- original.js
+++ change.js
@@ -1,50 +1,52 @@
-/****
+/**** 
 * Classes
 ****/
 // Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.createAsset('hero', 'Hero character', 0.5, 0.5);
-  self.speed = 5;
-  self.jumpPower = -15;
-  self.gravity = 0.5;
-  self.isJumping = false;
-  self.velocityY = 0;
-  self.update = function () {
-    // Apply gravity
-    if (self.isJumping) {
-      self.velocityY += self.gravity;
-      self.y += self.velocityY;
-      if (self.y > game.height - heroGraphics.height / 2) {
-        self.isJumping = false;
-        self.y = game.height - heroGraphics.height / 2;
-      }
-    }
-  };
-  self.jump = function () {
-    if (!self.isJumping) {
-      self.isJumping = true;
-      self.velocityY = self.jumpPower;
-    }
-  };
+	var self = Container.call(this);
+	var heroGraphics = self.createAsset('hero', 'Hero character', 0.5, 0.5);
+	self.speed = 5;
+	self.jumpPower = -18;
+	self.gravity = 0.5;
+	self.isJumping = false;
+	self.velocityY = 0;
+	self.update = function () {
+		// Apply gravity
+		if (self.isJumping) {
+			self.velocityY += self.gravity;
+			self.y += self.velocityY;
+			if (self.y > game.height - heroGraphics.height / 2) {
+				self.isJumping = false;
+				self.y = game.height - heroGraphics.height / 2;
+			}
+		}
+	};
+	self.jump = function () {
+		if (!self.isJumping) {
+			self.isJumping = true;
+			self.velocityY = self.jumpPower;
+		}
+	};
 });
 // Obstacle class
 var Obstacle = Container.expand(function () {
-  var self = Container.call(this);
-  var obstacleGraphics = self.createAsset('obstacle', 'Obstacle', 0.5, 1);
-  self.speed = -6;
-  self.move = function () {
-    self.x += self.speed;
-  };
+	var self = Container.call(this);
+	var obstacleGraphics = self.createAsset('obstacle', 'Obstacle', 0.5, 1);
+	self.speed = -6;
+	self.move = function () {
+		self.x += self.speed;
+	};
 });
-/****
+
+/**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background
+	backgroundColor: 0x000000 // Init game with black background
 });
-/****
+
+/**** 
 * Game Code
 ****/
 // Initialize hero
 var hero = game.addChild(new Hero());
@@ -56,49 +58,49 @@
 
 // Initialize score
 var score = 0;
 var scoreTxt = new Text2(score.toString(), {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 
 // Game tick event
 LK.on('tick', function () {
-  // Update hero
-  hero.update();
+	// Update hero
+	hero.update();
 
-  // Move and check obstacles
-  for (var i = obstacles.length - 1; i >= 0; i--) {
-    obstacles[i].move();
-    // Check for collision with hero
-    if (hero.intersects(obstacles[i])) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-      return;
-    }
-    // Remove off-screen obstacles
-    if (obstacles[i].x < -obstacles[i].width) {
-      obstacles[i].destroy();
-      obstacles.splice(i, 1);
-    }
-  }
+	// Move and check obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		obstacles[i].move();
+		// Check for collision with hero
+		if (hero.intersects(obstacles[i])) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		// Remove off-screen obstacles
+		if (obstacles[i].x < -obstacles[i].width) {
+			obstacles[i].destroy();
+			obstacles.splice(i, 1);
+		}
+	}
 
-  // Increment score
-  score++;
-  scoreTxt.setText(score.toString());
+	// Increment score
+	score++;
+	scoreTxt.setText(score.toString());
 
-  // Add new obstacles
-  if (LK.ticks % 120 == 0) {
-    var obstacle = new Obstacle();
-    obstacle.x = game.width;
-    obstacle.y = game.height;
-    obstacles.push(obstacle);
-    game.addChild(obstacle);
-  }
+	// Add new obstacles
+	if (LK.ticks % 120 == 0) {
+		var obstacle = new Obstacle();
+		obstacle.x = game.width;
+		obstacle.y = game.height;
+		obstacles.push(obstacle);
+		game.addChild(obstacle);
+	}
 });
 
 // Touch event to make the hero jump
 game.on('down', function (obj) {
-  hero.jump();
+	hero.jump();
 });
\ No newline at end of file