var TargetIndicator = Container.expand(function () {
	var self = Container.call(this);
	var targetGraphics = XS.getAsset('target', 'Target Indicator', .5, .5);
	self.addChild(targetGraphics);
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = XS.getAsset('player', 'Player character', .5, .5);
	self.addChild(playerGraphics);
	self.targetX = 2048 / 2;
	self.targetY = 2732 / 2;
	self.speed = 5;
	self.move = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.setTarget = function (x, y) {
		self.targetX = x;
		self.targetY = y;
	};
	self.shoot = function () {};
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = XS.getAsset('enemy', 'Enemy character', .5, .5);
	self.addChild(enemyGraphics);
	self.move = function () {};
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = XS.getAsset('bullet', 'Bullet', .5, .5);
	self.addChild(bulletGraphics);
	self.move = function () {};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = XS.getAsset('background', 'Background', .5, .5);
	background.x = 2048 / 2;
	background.y = 2732 / 2;
	self.addChild(background);
	var targetIndicator = new TargetIndicator();
	targetIndicator.x = 2048 / 2;
	targetIndicator.y = 2732 / 2;
	self.addChild(targetIndicator);
	var player = self.addChild(new Player());
	player.x = 2048 / 2;
	player.y = 2732 / 2;
	var enemies = [];
	for (var i = 0; i < 10; i++) {
		var enemy = self.addChild(new Enemy());
		enemy.x = Math.random() * (2048 - 400) + 200;
		enemy.y = Math.random() * (2732 - 400) + 200;
		enemies.push(enemy);
	}
	var bullets = [];
	XS.on('tick', function () {
		player.move(0, 0);
		var dx = player.targetX - player.x;
		var dy = player.targetY - player.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < player.speed) {
			targetIndicator.visible = false;
		}
		for (var i = 0; i < enemies.length; i++) {
			enemies[i].move();
		}
		for (var i = 0; i < bullets.length; i++) {
			bullets[i].move();
		}
	});
	stage.on('down', function (obj) {
		var pos = obj.event.getLocalPosition(self);
		player.setTarget(pos.x, pos.y);
		targetIndicator.x = pos.x;
		targetIndicator.y = pos.y;
		targetIndicator.visible = true;
	});
});

===================================================================
--- original.js
+++ change.js
@@ -52,10 +52,10 @@
 	player.y = 2732 / 2;
 	var enemies = [];
 	for (var i = 0; i < 10; i++) {
 		var enemy = self.addChild(new Enemy());
-		enemy.x = Math.random() * 2048;
-		enemy.y = Math.random() * 2732;
+		enemy.x = Math.random() * (2048 - 400) + 200;
+		enemy.y = Math.random() * (2732 - 400) + 200;
 		enemies.push(enemy);
 	}
 	var bullets = [];
 	XS.on('tick', function () {