===================================================================
--- original.js
+++ change.js
@@ -24,8 +24,34 @@
 			self.targetY = Math.random() * 2732;
 		}
 	};
 });
+// House class representing a house entity
+var House = Container.expand(function () {
+	var self = Container.call(this);
+	var houseGraphics = self.attachAsset('house', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.price = 500; // Initial price of the house
+	self.upgradeLevel = 0; // Initial upgrade level
+	// Method to upgrade the house
+	self.upgrade = function () {
+		self.upgradeLevel++;
+		self.price += 200; // Increase price with each upgrade
+	};
+	// Method to sell the house
+	self.sell = function () {
+		var sellPrice = self.price;
+		self.destroy();
+		return sellPrice;
+	};
+	// Method to check if a point is within the house's bounds
+	self.containsPoint = function (point) {
+		var bounds = houseGraphics.getBounds();
+		return point.x >= bounds.x && point.x <= bounds.x + bounds.width && point.y >= bounds.y && point.y <= bounds.y + bounds.height;
+	};
+});
 //<Assets used in the game will automatically appear here>
 // Phone class representing a phone entity
 var Phone = Container.expand(function () {
 	var self = Container.call(this);
@@ -111,8 +137,35 @@
 		if (index > -1) {
 			player.phones.splice(index, 1);
 		}
 	};
+	// Method to buy a house
+	self.buyHouse = function (player) {
+		if (player.money >= 500) {
+			var newHouse = new House();
+			newHouse.x = Math.random() * 2048;
+			newHouse.y = Math.random() * 2732;
+			houses.push(newHouse);
+			game.addChild(newHouse);
+			player.money -= 500;
+		}
+	};
+	// Method to upgrade a house
+	self.upgradeHouse = function (player, house) {
+		if (player.money >= 200) {
+			house.upgrade();
+			player.money -= 200;
+		}
+	};
+	// Method to sell a house
+	self.sellHouse = function (player, house) {
+		var sellPrice = house.sell();
+		player.money += sellPrice;
+		var index = houses.indexOf(house);
+		if (index > -1) {
+			houses.splice(index, 1);
+		}
+	};
 	// Method to buy an old phone
 	self.buyOldPhone = function (player) {
 		if (player.money >= 50) {
 			// Old phones cost less
@@ -153,8 +206,17 @@
 	customer.y = Math.random() * 2732;
 	customers.push(customer);
 	game.addChild(customer);
 }
+// Initialize houses
+var houses = [];
+for (var i = 0; i < 3; i++) {
+	var house = new House();
+	house.x = Math.random() * 2048;
+	house.y = Math.random() * 2732;
+	houses.push(house);
+	game.addChild(house);
+}
 // Initialize customers
 var customers = [];
 for (var i = 0; i < 5; i++) {
 	var customer = new Customer();
@@ -183,8 +245,12 @@
 	// Update customers' positions
 	for (var i = 0; i < customers.length; i++) {
 		customers[i].update();
 	}
+	// Update houses' positions
+	for (var i = 0; i < houses.length; i++) {
+		houses[i].update();
+	}
 	// Update customers' positions
 	for (var i = 0; i < customers.length; i++) {
 		customers[i].update();
 	}
@@ -207,13 +273,30 @@
 		} else {
 			shop.upgradePhone(player, touchedPhone);
 		}
 	} else {
-		// Buy a new phone if no phone was touched
-		if (obj.event && obj.event.detail === 2) {
-			// Check for double click
-			shop.buyOldPhone(player);
+		// Check if a house was touched
+		var touchedHouse = null;
+		for (var i = 0; i < houses.length; i++) {
+			if (houses[i].containsPoint(localPos)) {
+				touchedHouse = houses[i];
+				break;
+			}
+		}
+		if (touchedHouse) {
+			// Upgrade or sell the touched house
+			if (obj.event.shiftKey) {
+				shop.sellHouse(player, touchedHouse);
+			} else {
+				shop.upgradeHouse(player, touchedHouse);
+			}
 		} else {
-			shop.buyPhone(player);
+			// Buy a new phone if no phone or house was touched
+			if (obj.event && obj.event.detail === 2) {
+				// Check for double click
+				shop.buyOldPhone(player);
+			} else {
+				shop.buyPhone(player);
+			}
 		}
 	}
 };
\ No newline at end of file