var HealthBar = Container.expand(function () {
	var self = Container.call(this);
	var barGraphics = self.createAsset('healthbar', 'Health bar', 0, 0.5);
	self.update = function (health) {
		barGraphics.scale.x = health / 100;
	};
});
var Prison = Container.expand(function () {
	var self = Container.call(this);
	var prisonGraphics = self.createAsset('prison', 'Prison object', .5, .5);
	self.freezePlayer = function (player, monster) {
		if (self.intersects(player)) {
			player.isFrozen = true;
			monster.scale.x *= 1.001;
			monster.scale.y *= 1.001;
			LK.setTimeout(function () {
				player.isFrozen = false;
			}, 3000);
			self.destroy();
		}
	};
	self.update = function (player, monster) {
		self.freezePlayer(player, monster);
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.createAsset('player', 'Player character', .5, .5);
	self.healthBar = self.addChild(new HealthBar());
	self.healthBar.y = -playerGraphics.height + 80;
	self.healthBar.x = -60;
	self.targetPos = {
		x: self.x,
		y: self.y
	};
	self.health = 100;
	self.isFrozen = false;
	self.move = function () {
		var dx = self.targetPos.x - self.x;
		var dy = self.targetPos.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0 && !self.isFrozen) {
			self.x += dx / distance * 4;
			self.y += dy / distance * 4;
		}
	};
	self.update = function () {
		self.move();
		self.healthBar.update(self.health);
	};
});
var Monster = Container.expand(function () {
	var self = Container.call(this);
	var monsterGraphics = self.createAsset('monster', 'Monster character', .5, .5);
	self.chase = function (player) {
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.x += dx / distance * 2;
			self.y += dy / distance * 2;
		}
	};
	self.update = function () {};
});
var Maze = Container.expand(function () {
	var self = Container.call(this);
	var mazeGraphics = self.createAsset('maze', 'Maze structure', .5, .5);
	self.generate = function () {};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var maze = self.addChild(new Maze());
	var player = self.addChild(new Player());
	var survivalTimeDisplay = new Text2('0', {
		size: 150,
		fill: '#ffffff'
	});
	survivalTimeDisplay.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(survivalTimeDisplay);
	var monster = self.addChild(new Monster());
	var prisons = [];
	player.x = 1024;
	player.y = 1366;
	monster.x = 2048;
	monster.y = 2732;
	maze.generate();
	self.spawnPrison = function () {
		var prison = self.addChild(new Prison());
		prison.x = Math.random() * 2048;
		prison.y = Math.random() * 2732;
		prisons.push(prison);
	};
	var isGameOver = false;
	var survivalTime = 0;
	var isGameStarted = false;
	var playButton = self.createAsset('playButton', 'Play button', .5, .5);
	playButton.x = 1024;
	playButton.y = 1366;
	playButton.on('down', function () {
		self.removeChild(playButton);
		isGameStarted = true;
	});
	LK.on('tick', function () {
		if (isGameStarted) {
			player.update();
			monster.chase(player);
			monster.update();
			if (LK.ticks % 180 === 0) {
				self.spawnPrison();
			}
			survivalTime += 1 / 60;
			for (var i = 0; i < prisons.length; i++) {
				prisons[i].update(player, monster);
			}
			if (player.intersects(monster)) {
				player.health -= 1;
				if (player.health <= 0) {
					isGameOver = true;
				}
			}
			survivalTimeDisplay.setText(Math.floor(survivalTime));
			if (isGameOver) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
			}
		}
	});
	var isMouseDown = false;
	stage.on('down', function (obj) {
		var event = obj.event;
		player.targetPos = event.getLocalPosition(self);
		isMouseDown = true;
	});
	stage.on('move', function (obj) {
		if (isMouseDown) {
			var event = obj.event;
			player.targetPos = event.getLocalPosition(self);
		}
	});
	stage.on('up', function (obj) {
		isMouseDown = false;
	});
});

===================================================================
--- original.js
+++ change.js
@@ -105,27 +105,27 @@
 		if (isGameStarted) {
 			player.update();
 			monster.chase(player);
 			monster.update();
-		}
-		if (LK.ticks % 180 === 0) {
-			self.spawnPrison();
-		}
-		survivalTime += 1 / 60;
-		for (var i = 0; i < prisons.length; i++) {
-			prisons[i].update(player, monster);
-		}
-		if (player.intersects(monster)) {
-			player.health -= 1;
-			if (player.health <= 0) {
-				isGameOver = true;
+			if (LK.ticks % 180 === 0) {
+				self.spawnPrison();
 			}
+			survivalTime += 1 / 60;
+			for (var i = 0; i < prisons.length; i++) {
+				prisons[i].update(player, monster);
+			}
+			if (player.intersects(monster)) {
+				player.health -= 1;
+				if (player.health <= 0) {
+					isGameOver = true;
+				}
+			}
+			survivalTimeDisplay.setText(Math.floor(survivalTime));
+			if (isGameOver) {
+				LK.effects.flashScreen(0xff0000, 1000);
+				LK.showGameOver();
+			}
 		}
-		survivalTimeDisplay.setText(Math.floor(survivalTime));
-		if (isGameOver) {
-			LK.effects.flashScreen(0xff0000, 1000);
-			LK.showGameOver();
-		}
 	});
 	var isMouseDown = false;
 	stage.on('down', function (obj) {
 		var event = obj.event;