/**** 
* Classes
****/ 
// Define a class for Blocks
var Block = Container.expand(function () {
	var self = Container.call(this);
	var blockGraphics = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Block update logic
	};
});
// Define a class for Items
var Item = Container.expand(function () {
	var self = Container.call(this);
	var itemGraphics = self.attachAsset('item', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Item update logic
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define a class for the Player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		// Store the last position
		self.lastX = self.x;
		self.lastY = self.y;
		// Player update logic
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Init game with sky blue background
});

/**** 
* Game Code
****/ 
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 150;
// Initialize blocks to create a minecraft style dirt surface
var blocks = [];
for (var i = 0; i < 20; i++) {
	for (var j = 0; j < 10; j++) {
		var block = new Block();
		block.x = i * 100;
		block.y = 2732 - j * 100;
		blocks.push(block);
		game.addChild(block);
	}
}
// Initialize items
var items = [];
for (var i = 0; i < 5; i++) {
	var item = new Item();
	item.x = Math.random() * 2048;
	item.y = Math.random() * (2732 - 300);
	items.push(item);
	game.addChild(item);
}
// Handle player movement
game.move = function (x, y, obj) {
	player.x = x;
	player.y = y;
};
// Update game logic
game.update = function () {
	// Update player
	player.update();
	// Check for collisions between player and blocks
	blocks.forEach(function (block, index) {
		if (player.intersects(block)) {
			// Handle block collision
			player.x = player.lastX;
			player.y = player.lastY;
		}
	});
	// Update blocks
	blocks.forEach(function (block) {
		block.update();
	});
	// Update items
	items.forEach(function (item) {
		item.update();
	});
	// Check for collisions between player and items
	items.forEach(function (item, index) {
		if (player.intersects(item)) {
			// Handle item collection
			item.destroy();
			items.splice(index, 1);
		}
	});
};

===================================================================
--- original.js
+++ change.js
@@ -33,8 +33,11 @@
 		anchorY: 0.5
 	});
 	self.speed = 5;
 	self.update = function () {
+		// Store the last position
+		self.lastX = self.x;
+		self.lastY = self.y;
 		// Player update logic
 	};
 });
 
@@ -80,8 +83,16 @@
 // Update game logic
 game.update = function () {
 	// Update player
 	player.update();
+	// Check for collisions between player and blocks
+	blocks.forEach(function (block, index) {
+		if (player.intersects(block)) {
+			// Handle block collision
+			player.x = player.lastX;
+			player.y = player.lastY;
+		}
+	});
 	// Update blocks
 	blocks.forEach(function (block) {
 		block.update();
 	});