===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,383 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var GridSystem = Container.expand(function () {
+	var self = Container.call(this);
+	self.gridWidth = 8;
+	self.gridHeight = 10;
+	self.cellSize = 200;
+	self.grid = [];
+	for (var y = 0; y < self.gridHeight; y++) {
+		self.grid[y] = [];
+		for (var x = 0; x < self.gridWidth; x++) {
+			self.grid[y][x] = null;
+			var gridSquare = self.addChild(LK.getAsset('gridSquare', {
+				anchorX: 0,
+				anchorY: 0
+			}));
+			gridSquare.x = x * self.cellSize + 200;
+			gridSquare.y = y * self.cellSize + 400;
+			gridSquare.alpha = 0.3;
+		}
+	}
+	// Add water features
+	var waterFeature1 = self.addChild(LK.getAsset('waterFeature', {
+		anchorX: 0,
+		anchorY: 0
+	}));
+	waterFeature1.x = 2 * self.cellSize + 200;
+	waterFeature1.y = 8 * self.cellSize + 400;
+	var waterFeature2 = self.addChild(LK.getAsset('waterFeature', {
+		anchorX: 0,
+		anchorY: 0
+	}));
+	waterFeature2.x = 5 * self.cellSize + 200;
+	waterFeature2.y = 8 * self.cellSize + 400;
+	self.canPlaceHabitat = function (habitat, gridX, gridY) {
+		if (gridX < 0 || gridY < 0 || gridX + habitat.gridSize > self.gridWidth || gridY + habitat.gridSize > self.gridHeight) {
+			return false;
+		}
+		for (var y = gridY; y < gridY + habitat.gridSize; y++) {
+			for (var x = gridX; x < gridX + habitat.gridSize; x++) {
+				if (self.grid[y][x] !== null) {
+					return false;
+				}
+			}
+		}
+		return true;
+	};
+	self.placeHabitat = function (habitat, gridX, gridY) {
+		if (!self.canPlaceHabitat(habitat, gridX, gridY)) {
+			return false;
+		}
+		for (var y = gridY; y < gridY + habitat.gridSize; y++) {
+			for (var x = gridX; x < gridX + habitat.gridSize; x++) {
+				self.grid[y][x] = habitat;
+			}
+		}
+		habitat.gridX = gridX;
+		habitat.gridY = gridY;
+		habitat.x = gridX * self.cellSize + 200;
+		habitat.y = gridY * self.cellSize + 400;
+		habitat.placed = true;
+		// Check for penguin water bonus
+		if (habitat.animalType === 'penguin') {
+			var nearWater = false;
+			if ((gridX === 1 || gridX === 2 || gridX === 3) && gridY === 7) nearWater = true;
+			if ((gridX === 4 || gridX === 5 || gridX === 6) && gridY === 7) nearWater = true;
+			if (nearWater) {
+				habitat.visitorPoints *= 1.5;
+				habitat.revenue *= 1.5;
+				LK.effects.flashObject(habitat, 0x00ff00, 1000);
+			}
+		}
+		visitorSatisfaction += habitat.visitorPoints;
+		updateUI();
+		LK.getSound('placeHabitat').play();
+		return true;
+	};
+	self.removeHabitat = function (habitat) {
+		if (!habitat.placed) return;
+		for (var y = habitat.gridY; y < habitat.gridY + habitat.gridSize; y++) {
+			for (var x = habitat.gridX; x < habitat.gridX + habitat.gridSize; x++) {
+				self.grid[y][x] = null;
+			}
+		}
+		visitorSatisfaction -= habitat.visitorPoints;
+		habitat.placed = false;
+		habitat.gridX = -1;
+		habitat.gridY = -1;
+		updateUI();
+	};
+	self.getGridPosition = function (worldX, worldY) {
+		var gridX = Math.floor((worldX - 200) / self.cellSize);
+		var gridY = Math.floor((worldY - 400) / self.cellSize);
+		return {
+			x: gridX,
+			y: gridY
+		};
+	};
+	return self;
+});
+var Habitat = Container.expand(function (animalType, size) {
+	var self = Container.call(this);
+	self.animalType = animalType;
+	self.gridSize = size;
+	self.visitorPoints = 0;
+	self.revenue = 0;
+	self.placed = false;
+	self.gridX = -1;
+	self.gridY = -1;
+	var habitatGraphics;
+	if (animalType === 'lion') {
+		habitatGraphics = self.attachAsset('lionHabitat', {
+			anchorX: 0,
+			anchorY: 0
+		});
+		self.visitorPoints = 10;
+		self.revenue = 5;
+	} else if (animalType === 'elephant') {
+		habitatGraphics = self.attachAsset('elephantHabitat', {
+			anchorX: 0,
+			anchorY: 0
+		});
+		self.visitorPoints = 25;
+		self.revenue = 15;
+	} else if (animalType === 'zebra') {
+		habitatGraphics = self.attachAsset('zebraHabitat', {
+			anchorX: 0,
+			anchorY: 0
+		});
+		self.visitorPoints = 8;
+		self.revenue = 4;
+	} else if (animalType === 'penguin') {
+		habitatGraphics = self.attachAsset('penguinHabitat', {
+			anchorX: 0,
+			anchorY: 0
+		});
+		self.visitorPoints = 12;
+		self.revenue = 7;
+	}
+	self.animalLabel = new Text2(animalType.toUpperCase(), {
+		size: 24,
+		fill: 0x000000
+	});
+	self.animalLabel.anchor.set(0.5, 0.5);
+	self.animalLabel.x = habitatGraphics.width / 2;
+	self.animalLabel.y = habitatGraphics.height / 2;
+	self.addChild(self.animalLabel);
+	self.lastRevenueTime = Date.now();
+	self.update = function () {
+		if (self.placed && Date.now() - self.lastRevenueTime > 3000) {
+			self.lastRevenueTime = Date.now();
+			var coinEffect = game.addChild(LK.getAsset('coin', {
+				anchorX: 0.5,
+				anchorY: 0.5
+			}));
+			coinEffect.x = self.x + self.width / 2;
+			coinEffect.y = self.y + self.height / 2;
+			tween(coinEffect, {
+				y: coinEffect.y - 100,
+				alpha: 0
+			}, {
+				duration: 1000,
+				onFinish: function onFinish() {
+					coinEffect.destroy();
+				}
+			});
+			coins += self.revenue;
+			updateUI();
+			LK.getSound('collectCoin').play();
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87ceeb
+});
+
+/**** 
+* Game Code
+****/ 
+var coins = 100;
+var visitorSatisfaction = 0;
+var targetSatisfaction = 200;
+var selectedAnimalType = null;
+var draggedHabitat = null;
+var habitats = [];
+var gridSystem = game.addChild(new GridSystem());
+// UI Elements
+var coinsText = new Text2('Coins: ' + coins, {
+	size: 40,
+	fill: 0xFFFFFF
+});
+coinsText.anchor.set(0, 0);
+LK.gui.topRight.addChild(coinsText);
+var satisfactionText = new Text2('Satisfaction: ' + visitorSatisfaction + '/' + targetSatisfaction, {
+	size: 40,
+	fill: 0xFFFFFF
+});
+satisfactionText.anchor.set(0.5, 0);
+LK.gui.top.addChild(satisfactionText);
+// Animal selection buttons
+var buttonY = 150;
+var buttonSpacing = 300;
+var lionButton = LK.gui.bottomLeft.addChild(LK.getAsset('lionHabitat', {
+	anchorX: 0,
+	anchorY: 1,
+	scaleX: 0.8,
+	scaleY: 0.8
+}));
+lionButton.x = 100;
+lionButton.y = -buttonY;
+var elephantButton = LK.gui.bottomLeft.addChild(LK.getAsset('elephantHabitat', {
+	anchorX: 0,
+	anchorY: 1,
+	scaleX: 0.4,
+	scaleY: 0.4
+}));
+elephantButton.x = 100 + buttonSpacing;
+elephantButton.y = -buttonY;
+var zebraButton = LK.gui.bottomLeft.addChild(LK.getAsset('zebraHabitat', {
+	anchorX: 0,
+	anchorY: 1,
+	scaleX: 0.8,
+	scaleY: 0.8
+}));
+zebraButton.x = 100 + buttonSpacing * 2;
+zebraButton.y = -buttonY;
+var penguinButton = LK.gui.bottomLeft.addChild(LK.getAsset('penguinHabitat', {
+	anchorX: 0,
+	anchorY: 1,
+	scaleX: 0.8,
+	scaleY: 0.8
+}));
+penguinButton.x = 100 + buttonSpacing * 3;
+penguinButton.y = -buttonY;
+// Button labels
+var lionLabel = new Text2('LION\n$20', {
+	size: 20,
+	fill: 0x000000
+});
+lionLabel.anchor.set(0.5, 0.5);
+lionLabel.x = lionButton.x + 75;
+lionLabel.y = lionButton.y - 75;
+LK.gui.bottomLeft.addChild(lionLabel);
+var elephantLabel = new Text2('ELEPHANT\n$50', {
+	size: 20,
+	fill: 0x000000
+});
+elephantLabel.anchor.set(0.5, 0.5);
+elephantLabel.x = elephantButton.x + 75;
+elephantLabel.y = elephantButton.y - 75;
+LK.gui.bottomLeft.addChild(elephantLabel);
+var zebraLabel = new Text2('ZEBRA\n$15', {
+	size: 20,
+	fill: 0x000000
+});
+zebraLabel.anchor.set(0.5, 0.5);
+zebraLabel.x = zebraButton.x + 75;
+zebraLabel.y = zebraButton.y - 75;
+LK.gui.bottomLeft.addChild(zebraLabel);
+var penguinLabel = new Text2('PENGUIN\n$25', {
+	size: 20,
+	fill: 0x000000
+});
+penguinLabel.anchor.set(0.5, 0.5);
+penguinLabel.x = penguinButton.x + 75;
+penguinLabel.y = penguinButton.y - 75;
+LK.gui.bottomLeft.addChild(penguinLabel);
+function updateUI() {
+	coinsText.setText('Coins: ' + coins);
+	satisfactionText.setText('Satisfaction: ' + visitorSatisfaction + '/' + targetSatisfaction);
+	if (visitorSatisfaction >= targetSatisfaction) {
+		LK.showYouWin();
+	}
+}
+function getAnimalCost(animalType) {
+	switch (animalType) {
+		case 'lion':
+			return 20;
+		case 'elephant':
+			return 50;
+		case 'zebra':
+			return 15;
+		case 'penguin':
+			return 25;
+		default:
+			return 0;
+	}
+}
+function getAnimalSize(animalType) {
+	return animalType === 'elephant' ? 2 : 1;
+}
+function createHabitat(animalType) {
+	var cost = getAnimalCost(animalType);
+	if (coins < cost) return null;
+	coins -= cost;
+	updateUI();
+	var size = getAnimalSize(animalType);
+	var habitat = new Habitat(animalType, size);
+	habitats.push(habitat);
+	return habitat;
+}
+// Button event handlers
+lionButton.down = function (x, y, obj) {
+	var habitat = createHabitat('lion');
+	if (habitat) {
+		draggedHabitat = habitat;
+		game.addChild(habitat);
+		var gamePos = game.toLocal(obj.parent.toGlobal(obj.position));
+		habitat.x = gamePos.x;
+		habitat.y = gamePos.y;
+	}
+};
+elephantButton.down = function (x, y, obj) {
+	var habitat = createHabitat('elephant');
+	if (habitat) {
+		draggedHabitat = habitat;
+		game.addChild(habitat);
+		var gamePos = game.toLocal(obj.parent.toGlobal(obj.position));
+		habitat.x = gamePos.x;
+		habitat.y = gamePos.y;
+	}
+};
+zebraButton.down = function (x, y, obj) {
+	var habitat = createHabitat('zebra');
+	if (habitat) {
+		draggedHabitat = habitat;
+		game.addChild(habitat);
+		var gamePos = game.toLocal(obj.parent.toGlobal(obj.position));
+		habitat.x = gamePos.x;
+		habitat.y = gamePos.y;
+	}
+};
+penguinButton.down = function (x, y, obj) {
+	var habitat = createHabitat('penguin');
+	if (habitat) {
+		draggedHabitat = habitat;
+		game.addChild(habitat);
+		var gamePos = game.toLocal(obj.parent.toGlobal(obj.position));
+		habitat.x = gamePos.x;
+		habitat.y = gamePos.y;
+	}
+};
+game.move = function (x, y, obj) {
+	if (draggedHabitat) {
+		draggedHabitat.x = x - draggedHabitat.width / 2;
+		draggedHabitat.y = y - draggedHabitat.height / 2;
+	}
+};
+game.up = function (x, y, obj) {
+	if (draggedHabitat) {
+		var gridPos = gridSystem.getGridPosition(x, y);
+		if (gridSystem.placeHabitat(draggedHabitat, gridPos.x, gridPos.y)) {
+			// Successfully placed
+		} else {
+			// Failed to place, remove habitat and refund
+			var cost = getAnimalCost(draggedHabitat.animalType);
+			coins += cost;
+			updateUI();
+			var habitatIndex = habitats.indexOf(draggedHabitat);
+			if (habitatIndex > -1) {
+				habitats.splice(habitatIndex, 1);
+			}
+			draggedHabitat.destroy();
+		}
+		draggedHabitat = null;
+	}
+};
+game.update = function () {
+	for (var i = 0; i < habitats.length; i++) {
+		habitats[i].update();
+	}
+};
\ No newline at end of file