===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,421 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
+
+/**** 
+* Classes
+****/ 
+var Block = Container.expand(function (blockType, x, y) {
+	var self = Container.call(this);
+	self.blockType = blockType;
+	self.gridX = x;
+	self.gridY = y;
+	self.miningProgress = 0;
+	self.maxMiningTime = self.getMiningTime(blockType);
+	var blockGraphics = self.attachAsset(blockType, {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.x = x * BLOCK_SIZE;
+	self.y = y * BLOCK_SIZE;
+	self.getMiningTime = function (type) {
+		switch (type) {
+			case 'grass':
+				return 30;
+			case 'dirt':
+				return 30;
+			case 'wood':
+				return 60;
+			case 'stone':
+				return 90;
+			case 'coal':
+				return 120;
+			case 'iron':
+				return 150;
+			default:
+				return 60;
+		}
+	};
+	self.startMining = function () {
+		self.miningProgress = 0;
+		blockGraphics.alpha = 1;
+	};
+	self.updateMining = function () {
+		self.miningProgress++;
+		blockGraphics.alpha = 1 - self.miningProgress / self.maxMiningTime * 0.5;
+		if (self.miningProgress >= self.maxMiningTime) {
+			self.finishMining();
+			return true;
+		}
+		return false;
+	};
+	self.finishMining = function () {
+		inventory.addItem(self.blockType, 1);
+		LK.getSound('mine').play();
+		self.destroy();
+		worldBlocks[self.gridX + '_' + self.gridY] = null;
+	};
+	return self;
+});
+var Inventory = Container.expand(function () {
+	var self = Container.call(this);
+	self.items = {};
+	self.selectedSlot = 0;
+	self.maxSlots = 8;
+	self.slots = [];
+	self.slotGraphics = [];
+	for (var i = 0; i < self.maxSlots; i++) {
+		var slot = self.attachAsset('inventorySlot', {
+			anchorX: 0,
+			anchorY: 0,
+			x: i * 90 + 200,
+			y: 50
+		});
+		var slotText = new Text2('', {
+			size: 24,
+			fill: 0xFFFFFF
+		});
+		slotText.anchor.set(0.5, 0.5);
+		slotText.x = i * 90 + 240;
+		slotText.y = 90;
+		self.slots.push({
+			type: null,
+			count: 0,
+			text: slotText
+		});
+		self.slotGraphics.push(slot);
+		self.addChild(slotText);
+	}
+	var selectedGraphics = self.attachAsset('selectedSlot', {
+		anchorX: 0,
+		anchorY: 0,
+		x: 200,
+		y: 50
+	});
+	self.addItem = function (type, count) {
+		for (var i = 0; i < self.maxSlots; i++) {
+			if (self.slots[i].type === type) {
+				self.slots[i].count += count;
+				self.updateSlotDisplay(i);
+				return true;
+			}
+		}
+		for (var i = 0; i < self.maxSlots; i++) {
+			if (self.slots[i].type === null) {
+				self.slots[i].type = type;
+				self.slots[i].count = count;
+				self.updateSlotDisplay(i);
+				return true;
+			}
+		}
+		return false;
+	};
+	self.removeItem = function (type, count) {
+		for (var i = 0; i < self.maxSlots; i++) {
+			if (self.slots[i].type === type && self.slots[i].count >= count) {
+				self.slots[i].count -= count;
+				if (self.slots[i].count <= 0) {
+					self.slots[i].type = null;
+					self.slots[i].count = 0;
+				}
+				self.updateSlotDisplay(i);
+				return true;
+			}
+		}
+		return false;
+	};
+	self.updateSlotDisplay = function (index) {
+		var slot = self.slots[index];
+		if (slot.type) {
+			slot.text.setText(slot.count.toString());
+		} else {
+			slot.text.setText('');
+		}
+	};
+	self.selectSlot = function (index) {
+		if (index >= 0 && index < self.maxSlots) {
+			self.selectedSlot = index;
+			selectedGraphics.x = index * 90 + 200;
+		}
+	};
+	self.getSelectedItem = function () {
+		return self.slots[self.selectedSlot];
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.health = 100;
+	self.hunger = 100;
+	self.gridX = Math.floor(WORLD_WIDTH / 2);
+	self.gridY = 10;
+	self.x = self.gridX * BLOCK_SIZE + BLOCK_SIZE / 2;
+	self.y = (self.gridY + 1) * BLOCK_SIZE;
+	self.takeDamage = function (damage) {
+		self.health = Math.max(0, self.health - damage);
+		LK.getSound('hurt').play();
+		LK.effects.flashObject(self, 0xFF0000, 500);
+		if (self.health <= 0) {
+			LK.showGameOver();
+		}
+	};
+	self.update = function () {
+		self.hunger = Math.max(0, self.hunger - 0.1);
+		if (self.hunger <= 0 && LK.ticks % 180 == 0) {
+			self.takeDamage(5);
+		}
+	};
+	return self;
+});
+var Zombie = Container.expand(function (x, y) {
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('zombie', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.gridX = x;
+	self.gridY = y;
+	self.health = 50;
+	self.speed = 1;
+	self.attackCooldown = 0;
+	self.x = x * BLOCK_SIZE + BLOCK_SIZE / 2;
+	self.y = (y + 1) * BLOCK_SIZE;
+	self.update = function () {
+		if (self.attackCooldown > 0) {
+			self.attackCooldown--;
+		}
+		var distToPlayer = Math.abs(self.x - player.x) + Math.abs(self.y - player.y);
+		if (distToPlayer < 100) {
+			var dx = player.x - self.x;
+			var dy = player.y - self.y;
+			var length = Math.sqrt(dx * dx + dy * dy);
+			if (length > 0) {
+				self.x += dx / length * self.speed;
+				self.y += dy / length * self.speed;
+			}
+			if (distToPlayer < 60 && self.attackCooldown <= 0) {
+				player.takeDamage(10);
+				self.attackCooldown = 120;
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var BLOCK_SIZE = 64;
+var WORLD_WIDTH = 32;
+var WORLD_HEIGHT = 50;
+var DAY_LENGTH = 3600; // 60 seconds
+var NIGHT_LENGTH = 1800; // 30 seconds
+var worldBlocks = {};
+var player;
+var inventory;
+var zombies = [];
+var currentTime = 0;
+var isNight = false;
+var miningBlock = null;
+var cameraX = 0;
+var cameraY = 0;
+// Generate world
+function generateWorld() {
+	// Generate grass layer
+	for (var x = 0; x < WORLD_WIDTH; x++) {
+		var grassHeight = 15 + Math.floor(Math.sin(x * 0.3) * 3);
+		for (var y = grassHeight; y < WORLD_HEIGHT; y++) {
+			var blockType;
+			if (y === grassHeight) {
+				blockType = 'grass';
+			} else if (y < grassHeight + 5) {
+				blockType = 'dirt';
+			} else {
+				var rand = Math.random();
+				if (rand < 0.7) {
+					blockType = 'stone';
+				} else if (rand < 0.85) {
+					blockType = 'coal';
+				} else if (rand < 0.95) {
+					blockType = 'iron';
+				} else {
+					blockType = 'wood';
+				}
+			}
+			var block = new Block(blockType, x, y);
+			game.addChild(block);
+			worldBlocks[x + '_' + y] = block;
+		}
+	}
+}
+function updateCamera() {
+	cameraX = player.x - 1024;
+	cameraY = player.y - 1366;
+	cameraX = Math.max(0, Math.min(cameraX, WORLD_WIDTH * BLOCK_SIZE - 2048));
+	cameraY = Math.max(0, Math.min(cameraY, WORLD_HEIGHT * BLOCK_SIZE - 2732));
+	game.x = -cameraX;
+	game.y = -cameraY;
+}
+function updateDayNight() {
+	currentTime++;
+	var totalCycle = DAY_LENGTH + NIGHT_LENGTH;
+	var cyclePosition = currentTime % totalCycle;
+	var wasNight = isNight;
+	isNight = cyclePosition > DAY_LENGTH;
+	if (isNight && !wasNight) {
+		// Night just started
+		spawnZombies();
+	} else if (!isNight && wasNight) {
+		// Day just started
+		removeAllZombies();
+	}
+	var skyColor;
+	if (isNight) {
+		skyColor = 0x1A1A2E;
+	} else {
+		skyColor = 0x87CEEB;
+	}
+	game.setBackgroundColor(skyColor);
+}
+function spawnZombies() {
+	for (var i = 0; i < 3; i++) {
+		var spawnX = Math.floor(Math.random() * WORLD_WIDTH);
+		var spawnY = 10;
+		// Find surface
+		for (var y = 0; y < WORLD_HEIGHT; y++) {
+			if (worldBlocks[spawnX + '_' + y]) {
+				spawnY = y - 1;
+				break;
+			}
+		}
+		var zombie = new Zombie(spawnX, spawnY);
+		game.addChild(zombie);
+		zombies.push(zombie);
+	}
+}
+function removeAllZombies() {
+	for (var i = zombies.length - 1; i >= 0; i--) {
+		zombies[i].destroy();
+		zombies.splice(i, 1);
+	}
+}
+function getBlockAt(x, y) {
+	var gridX = Math.floor(x / BLOCK_SIZE);
+	var gridY = Math.floor(y / BLOCK_SIZE);
+	return worldBlocks[gridX + '_' + gridY];
+}
+function placeBlock(x, y) {
+	var gridX = Math.floor(x / BLOCK_SIZE);
+	var gridY = Math.floor(y / BLOCK_SIZE);
+	var key = gridX + '_' + gridY;
+	if (worldBlocks[key]) return false;
+	var selectedItem = inventory.getSelectedItem();
+	if (!selectedItem.type || selectedItem.count <= 0) return false;
+	// Check if block type can be placed
+	var placeableBlocks = ['dirt', 'stone', 'wood'];
+	if (placeableBlocks.indexOf(selectedItem.type) === -1) return false;
+	var block = new Block(selectedItem.type, gridX, gridY);
+	game.addChild(block);
+	worldBlocks[key] = block;
+	inventory.removeItem(selectedItem.type, 1);
+	LK.getSound('place').play();
+	return true;
+}
+// Initialize game
+generateWorld();
+player = new Player();
+game.addChild(player);
+inventory = new Inventory();
+LK.gui.bottom.addChild(inventory);
+// Add some starting items
+inventory.addItem('wood', 10);
+inventory.addItem('stone', 5);
+// Health display
+var healthText = new Text2('Health: 100', {
+	size: 36,
+	fill: 0xFFFFFF
+});
+healthText.anchor.set(0, 0);
+LK.gui.topRight.addChild(healthText);
+// Hunger display  
+var hungerText = new Text2('Hunger: 100', {
+	size: 36,
+	fill: 0xFFFFFF
+});
+hungerText.anchor.set(0, 0);
+hungerText.y = 50;
+LK.gui.topRight.addChild(hungerText);
+// Time display
+var timeText = new Text2('Day', {
+	size: 40,
+	fill: 0xFFFFFF
+});
+timeText.anchor.set(0.5, 0);
+LK.gui.top.addChild(timeText);
+game.down = function (x, y, obj) {
+	// Convert screen coordinates to world coordinates
+	var worldX = x + cameraX;
+	var worldY = y + cameraY;
+	var block = getBlockAt(worldX, worldY);
+	if (block) {
+		miningBlock = block;
+		miningBlock.startMining();
+	} else {
+		placeBlock(worldX, worldY);
+	}
+};
+game.up = function (x, y, obj) {
+	if (miningBlock) {
+		miningBlock = null;
+	}
+};
+// Inventory slot selection
+LK.gui.bottom.down = function (x, y, obj) {
+	if (y >= 50 && y <= 130) {
+		var slotIndex = Math.floor((x - 200) / 90);
+		if (slotIndex >= 0 && slotIndex < inventory.maxSlots) {
+			inventory.selectSlot(slotIndex);
+		}
+	}
+};
+game.update = function () {
+	// Update day/night cycle
+	updateDayNight();
+	// Update camera
+	updateCamera();
+	// Update mining
+	if (miningBlock) {
+		if (miningBlock.updateMining()) {
+			miningBlock = null;
+		}
+	}
+	// Update zombies
+	for (var i = zombies.length - 1; i >= 0; i--) {
+		var zombie = zombies[i];
+		if (zombie.health <= 0) {
+			zombie.destroy();
+			zombies.splice(i, 1);
+		}
+	}
+	// Update UI
+	healthText.setText('Health: ' + Math.floor(player.health));
+	hungerText.setText('Hunger: ' + Math.floor(player.hunger));
+	timeText.setText(isNight ? 'Night' : 'Day');
+	// Win condition - survive for 5 day/night cycles
+	if (currentTime > (DAY_LENGTH + NIGHT_LENGTH) * 5) {
+		LK.showYouWin();
+	}
+};
\ No newline at end of file