var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Bullet object', .5, .5);
	self.move = function () {
		self.x += Math.cos(self.rotation) * 5;
		self.y += Math.sin(self.rotation) * 5;
	};
});
var Gun = Container.expand(function () {
	var self = Container.call(this);
	var gunGraphics = self.createAsset('gun', 'Gun object', .5, .5);
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		return bullet;
	};
});
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.gun = self.addChild(new Gun());
	self.targetPos = {
		x: self.x,
		y: self.y
	};
	self.isFrozen = false;
	self.health = 100;
	self.healthBar = self.createAsset('healthbar', 'Player health bar', 0.5, 1);
	self.healthBar.width = self.health;
	self.healthBar.y = -self.healthBar.height - 60;
	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.shoot = function () {
		if (isMouseDown) {
			var dx = self.targetPos.x - self.x;
			var dy = self.targetPos.y - self.y;
			var bullet = self.gun.shoot();
			bullet.rotation = Math.atan2(dy, dx);
			Game.instance.addChild(bullet);
		}
	};
	self.update = function () {
		self.move();
		self.healthBar.width = 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);
	Game.instance = self;
	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;
	self.bullets = [];
	LK.on('tick', function () {
		for (var i = 0; i < self.bullets.length; i++) {
			self.bullets[i].move();
		}
		player.update();
		player.shoot();
		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
@@ -1,9 +1,10 @@
 var Bullet = Container.expand(function () {
 	var self = Container.call(this);
 	var bulletGraphics = self.createAsset('bullet', 'Bullet object', .5, .5);
 	self.move = function () {
-		self.x += 5;
+		self.x += Math.cos(self.rotation) * 5;
+		self.y += Math.sin(self.rotation) * 5;
 	};
 });
 var Gun = Container.expand(function () {
 	var self = Container.call(this);
@@ -52,9 +53,16 @@
 		var distance = Math.sqrt(dx * dx + dy * dy);
 		if (distance > 0 && !self.isFrozen) {
 			self.x += dx / distance * 4;
 			self.y += dy / distance * 4;
+		}
+	};
+	self.shoot = function () {
+		if (isMouseDown) {
+			var dx = self.targetPos.x - self.x;
+			var dy = self.targetPos.y - self.y;
 			var bullet = self.gun.shoot();
+			bullet.rotation = Math.atan2(dy, dx);
 			Game.instance.addChild(bullet);
 		}
 	};
 	self.update = function () {
@@ -112,8 +120,9 @@
 		for (var i = 0; i < self.bullets.length; i++) {
 			self.bullets[i].move();
 		}
 		player.update();
+		player.shoot();
 		monster.chase(player);
 		monster.update();
 		if (LK.ticks % 180 === 0) {
 			self.spawnPrison();