/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('starShape', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.width = 20;
	graphics.height = 20;
	graphics.tint = 0x00FF00;
	self.speed = 5;
	self.damage = 50;
	self.row = 0;
	self.update = function () {
		self.x += self.speed;
		// Check collision with zombies
		for (var i = zombies.length - 1; i >= 0; i--) {
			var zombie = zombies[i];
			if (zombie.gridRow === self.row && Math.abs(self.x - zombie.x) < 30) {
				zombie.health -= self.damage;
				if (zombie.health <= 0) {
					zombie.destroy();
					zombies.splice(i, 1);
				}
				self.destroy();
				for (var j = bullets.length - 1; j >= 0; j--) {
					if (bullets[j] === self) {
						bullets.splice(j, 1);
						break;
					}
				}
				return;
			}
		}
		// Remove if off screen
		if (self.x > 2048) {
			self.destroy();
			for (var k = bullets.length - 1; k >= 0; k--) {
				if (bullets[k] === self) {
					bullets.splice(k, 1);
					break;
				}
			}
		}
	};
	return self;
});
// Event handlers
var LevelButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonBg = self.attachAsset('levelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.levelNumber = 1;
	self.setLevelNumber = function (number) {
		self.levelNumber = number;
		self.levelText.setText(number.toString());
	};
	self.isUnlocked = true;
	self.stars = 0;
	self.maxStars = 3;
	// Create level number text
	self.levelText = new Text2(self.levelNumber.toString(), {
		size: 50,
		fill: 0xFFFFFF
	});
	self.levelText.anchor.set(0.5, 0.5);
	self.levelText.y = -30;
	self.addChild(self.levelText);
	// Create stars display
	self.starContainers = [];
	for (var i = 0; i < self.maxStars; i++) {
		var star = LK.getAsset('starShape', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		star.x = (i - 1) * 50;
		star.y = 30;
		star.tint = 0x666666; // Dark by default
		self.addChild(star);
		self.starContainers.push(star);
	}
	self.setStars = function (starCount) {
		self.stars = starCount;
		for (var i = 0; i < self.maxStars; i++) {
			if (i < starCount) {
				self.starContainers[i].tint = 0xFFD700; // Golden
			} else {
				self.starContainers[i].tint = 0x666666; // Dark
			}
		}
	};
	self.setUnlocked = function (unlocked) {
		self.isUnlocked = unlocked;
		if (unlocked) {
			buttonBg.tint = 0xFFFFFF;
			self.levelText.tint = 0xFFFFFF;
		} else {
			buttonBg.tint = 0x666666;
			self.levelText.tint = 0x666666;
		}
	};
	self.down = function (x, y, obj) {
		if (self.isUnlocked) {
			LK.getSound('buttonClick').play();
			// Start the selected level
			startLevel(self.levelNumber);
		}
	};
	return self;
});
// Plant classes
var Peashooter = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('levelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.width = 80;
	graphics.height = 80;
	graphics.tint = 0x00FF00;
	self.health = 100;
	self.lastShot = 0;
	self.shootDelay = 90; // 1.5 seconds at 60fps
	self.gridRow = 0;
	self.gridCol = 0;
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x + 50;
		bullet.y = self.y;
		bullet.row = self.gridRow;
		bullets.push(bullet);
		game.addChild(bullet);
	};
	self.update = function () {
		if (LK.ticks - self.lastShot > self.shootDelay) {
			// Check if there's a zombie in this row
			var zombieInRow = false;
			for (var i = 0; i < zombies.length; i++) {
				if (zombies[i].gridRow === self.gridRow && zombies[i].x > self.x) {
					zombieInRow = true;
					break;
				}
			}
			if (zombieInRow) {
				self.shoot();
				self.lastShot = LK.ticks;
			}
		}
	};
	return self;
});
var Sunflower = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('starShape', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.width = 80;
	graphics.height = 80;
	graphics.tint = 0xFFD700;
	self.health = 100;
	self.lastSunGeneration = 0;
	self.sunDelay = 300; // 5 seconds at 60fps
	self.gridRow = 0;
	self.gridCol = 0;
	self.generateSun = function () {
		sun += 25;
		sunText.setText('Sun: ' + sun);
		self.lastSunGeneration = LK.ticks;
	};
	self.update = function () {
		if (LK.ticks - self.lastSunGeneration > self.sunDelay) {
			self.generateSun();
		}
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('levelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.width = 80;
	graphics.height = 80;
	graphics.tint = 0x8B4513;
	self.health = 100;
	self.speed = 0.5;
	self.gridRow = 0;
	self.isEating = false;
	self.eatDamage = 1;
	self.update = function () {
		if (!self.isEating) {
			self.x -= self.speed;
		}
		// Check if reached house
		if (self.x <= 150) {
			houseHealth -= self.eatDamage;
			healthText.setText('House Health: ' + houseHealth);
			if (houseHealth <= 0) {
				LK.showGameOver();
			}
		}
		// Check collision with plants
		for (var i = plants.length - 1; i >= 0; i--) {
			var plant = plants[i];
			if (plant.gridRow === self.gridRow && Math.abs(self.x - plant.x) < 50) {
				self.isEating = true;
				plant.health -= 2;
				if (plant.health <= 0) {
					plant.destroy();
					plants.splice(i, 1);
					self.isEating = false;
				}
				break;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2d5a27 // Dark green background for level selection
});

/**** 
* Game Code
****/ 
// Level selection screen variables
var levelButtons = [];
var totalLevels = 50;
var unlockedLevels = 1; // Only first level unlocked initially
var levelProgress = {}; // Store stars for each level
// Global game variables
var plants = [];
var zombies = [];
var bullets = [];
// Create background
var background = LK.getAsset('levelBackground', {
	anchorX: 0,
	anchorY: 0
});
game.addChild(background);
// Create title
var titleBg = LK.getAsset('titleBackground', {
	anchorX: 0.5,
	anchorY: 0.5
});
titleBg.x = 1024;
titleBg.y = 300;
game.addChild(titleBg);
var titleText = new Text2('Plants vs Zombies\nLevel Selection', {
	size: 60,
	fill: 0xFFFFFF
});
titleText.anchor.set(0.5, 0.5);
titleText.x = 1024;
titleText.y = 300;
game.addChild(titleText);
// Create level buttons in a grid layout
var buttonsPerRow = 5;
var buttonSpacingX = 350;
var buttonSpacingY = 200;
var startX = 400;
var startY = 600;
for (var i = 0; i < totalLevels; i++) {
	var levelButton = new LevelButton();
	levelButton.setLevelNumber(i + 1);
	// Calculate position in grid
	var row = Math.floor(i / buttonsPerRow);
	var col = i % buttonsPerRow;
	levelButton.x = startX + col * buttonSpacingX;
	levelButton.y = startY + row * buttonSpacingY;
	// Set unlock status
	levelButton.setUnlocked(i < unlockedLevels);
	// Set stars from progress (if any)
	if (levelProgress[i + 1]) {
		levelButton.setStars(levelProgress[i + 1]);
	} else {
		levelButton.setStars(0);
	}
	levelButtons.push(levelButton);
	game.addChild(levelButton);
}
// Function to start a level
function startLevel(levelNumber) {
	LK.getSound('levelSelect').play();
	console.log('Starting level: ' + levelNumber);
	// Clear the level selection screen
	game.removeChildren();
	// Initialize Level 1 game
	initializeLevel1();
}
// Initialize Level 1 Plants vs Zombies game
function initializeLevel1() {
	// Game variables
	var sun = 150;
	var houseHealth = 100;
	plants = []; // Make plants global
	zombies = []; // Make zombies global  
	bullets = []; // Make bullets global
	var sunflowers = [];
	var lastSunGeneration = 0;
	var lastZombieSpawn = 0;
	// Grid setup
	var gridRows = 5;
	var gridCols = 9;
	var gridCellWidth = 200;
	var gridCellHeight = 120;
	var gridStartX = 200;
	var gridStartY = 600;
	// UI elements
	var sunText = new Text2('Sun: ' + sun, {
		size: 40,
		fill: 0xFFD700
	});
	sunText.x = 50;
	sunText.y = 50;
	game.addChild(sunText);
	var healthText = new Text2('House Health: ' + houseHealth, {
		size: 40,
		fill: 0xFF0000
	});
	healthText.x = 50;
	healthText.y = 100;
	game.addChild(healthText);
	// Create grid
	for (var row = 0; row < gridRows; row++) {
		for (var col = 0; col < gridCols; col++) {
			var gridCell = LK.getAsset('levelButton', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			gridCell.x = gridStartX + col * gridCellWidth;
			gridCell.y = gridStartY + row * gridCellHeight;
			gridCell.width = gridCellWidth - 10;
			gridCell.height = gridCellHeight - 10;
			gridCell.tint = 0x90EE90;
			gridCell.alpha = 0.3;
			game.addChild(gridCell);
		}
	}
	// Plant selection buttons
	var peashooterButton = LK.getAsset('levelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	peashooterButton.x = 100;
	peashooterButton.y = 300;
	peashooterButton.width = 150;
	peashooterButton.height = 80;
	peashooterButton.tint = 0x00FF00;
	game.addChild(peashooterButton);
	var peashooterText = new Text2('Peashooter\n50 Sun', {
		size: 20,
		fill: 0x000000
	});
	peashooterText.anchor.set(0.5, 0.5);
	peashooterText.x = 100;
	peashooterText.y = 300;
	game.addChild(peashooterText);
	var sunflowerButton = LK.getAsset('levelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	sunflowerButton.x = 100;
	sunflowerButton.y = 400;
	sunflowerButton.width = 150;
	sunflowerButton.height = 80;
	sunflowerButton.tint = 0xFFD700;
	game.addChild(sunflowerButton);
	var sunflowerText = new Text2('Sunflower\n50 Sun', {
		size: 20,
		fill: 0x000000
	});
	sunflowerText.anchor.set(0.5, 0.5);
	sunflowerText.x = 100;
	sunflowerText.y = 400;
	game.addChild(sunflowerText);
	var selectedPlant = null;
	// Event handlers
	peashooterButton.down = function () {
		if (sun >= 50) {
			selectedPlant = 'peashooter';
		}
	};
	sunflowerButton.down = function () {
		if (sun >= 50) {
			selectedPlant = 'sunflower';
		}
	};
	game.down = function (x, y, obj) {
		if (selectedPlant && x >= gridStartX && x <= gridStartX + gridCols * gridCellWidth && y >= gridStartY && y <= gridStartY + gridRows * gridCellHeight) {
			var gridCol = Math.floor((x - gridStartX) / gridCellWidth);
			var gridRow = Math.floor((y - gridStartY) / gridCellHeight);
			// Check if position is valid and empty
			var positionEmpty = true;
			for (var i = 0; i < plants.length; i++) {
				if (plants[i].gridRow === gridRow && plants[i].gridCol === gridCol) {
					positionEmpty = false;
					break;
				}
			}
			if (positionEmpty && gridCol >= 0 && gridCol < gridCols && gridRow >= 0 && gridRow < gridRows) {
				var plant = null;
				if (selectedPlant === 'peashooter' && sun >= 50) {
					plant = new Peashooter();
					sun -= 50;
				} else if (selectedPlant === 'sunflower' && sun >= 50) {
					plant = new Sunflower();
					sun -= 50;
				}
				if (plant) {
					plant.x = gridStartX + gridCol * gridCellWidth;
					plant.y = gridStartY + gridRow * gridCellHeight;
					plant.gridRow = gridRow;
					plant.gridCol = gridCol;
					plants.push(plant);
					game.addChild(plant);
					sunText.setText('Sun: ' + sun);
					selectedPlant = null;
				}
			}
		}
	};
	// Game update function
	game.update = function () {
		// Spawn zombies
		if (LK.ticks - lastZombieSpawn > 300) {
			// Every 5 seconds
			var zombie = new Zombie();
			var row = Math.floor(Math.random() * gridRows);
			zombie.x = 1900;
			zombie.y = gridStartY + row * gridCellHeight;
			zombie.gridRow = row;
			zombies.push(zombie);
			game.addChild(zombie);
			lastZombieSpawn = LK.ticks;
		}
		// Update all game objects
		for (var i = plants.length - 1; i >= 0; i--) {
			plants[i].update();
		}
		for (var j = zombies.length - 1; j >= 0; j--) {
			zombies[j].update();
		}
		for (var k = bullets.length - 1; k >= 0; k--) {
			bullets[k].update();
		}
		// Generate sun from sunflowers
		if (LK.ticks - lastSunGeneration > 600) {
			// Every 10 seconds
			sun += 10;
			sunText.setText('Sun: ' + sun);
			lastSunGeneration = LK.ticks;
		}
		// Check win condition
		if (LK.ticks > 3600 && zombies.length === 0) {
			// After 1 minute with no zombies
			LK.showYouWin();
		}
	};
}
// Function to unlock next level
function unlockNextLevel() {
	if (unlockedLevels < totalLevels) {
		unlockedLevels++;
		if (levelButtons[unlockedLevels - 1]) {
			levelButtons[unlockedLevels - 1].setUnlocked(true);
		}
	}
}
// Function to set stars for a level
function setLevelStars(levelNumber, stars) {
	levelProgress[levelNumber] = stars;
	if (levelButtons[levelNumber - 1]) {
		levelButtons[levelNumber - 1].setStars(stars);
	}
}
// Simple game update for level selection screen
game.update = function () {
	// No specific updates needed for level selection
	// All interactions are handled by level button click events
};

===================================================================
--- original.js
+++ change.js
@@ -237,8 +237,12 @@
 var levelButtons = [];
 var totalLevels = 50;
 var unlockedLevels = 1; // Only first level unlocked initially
 var levelProgress = {}; // Store stars for each level
+// Global game variables
+var plants = [];
+var zombies = [];
+var bullets = [];
 // Create background
 var background = LK.getAsset('levelBackground', {
 	anchorX: 0,
 	anchorY: 0
@@ -298,11 +302,11 @@
 function initializeLevel1() {
 	// Game variables
 	var sun = 150;
 	var houseHealth = 100;
-	var plants = [];
-	var zombies = [];
-	var bullets = [];
+	plants = []; // Make plants global
+	zombies = []; // Make zombies global  
+	bullets = []; // Make bullets global
 	var sunflowers = [];
 	var lastSunGeneration = 0;
 	var lastZombieSpawn = 0;
 	// Grid setup