/**** 
* Classes
****/ 
// Meteor class: Falling enemy
var Meteor = Container.expand(function () {
	var self = Container.call(this);
	var meteor = self.attachAsset('meteor', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Randomize speed and rotation
	self.speed = 12 + Math.random() * meteorSpeedBoost;
	self.rotationSpeed = (Math.random() - 0.5) * 0.08;
	// For intersection tracking
	self.lastIntersecting = false;
	self.update = function () {
		self.y += self.speed;
		self.rotation += self.rotationSpeed;
	};
	return self;
});
// Projectile class: Player's bullet
var Projectile = Container.expand(function () {
	var self = Container.call(this);
	var proj = self.attachAsset('projectile', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Default direction: straight up
	self.vx = 0;
	self.vy = -38;
	self.setDirection = function (dx, dy) {
		// Normalize and scale to projectile speed
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len === 0) {
			self.vx = 0;
			self.vy = -38;
		} else {
			var speed = 38;
			self.vx = dx / len * speed;
			self.vy = dy / len * speed;
		}
		// Set rotation of projectile to match direction
		self.rotation = Math.atan2(self.vx, -self.vy);
	};
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Turret class: Player's cannon at the bottom
var Turret = Container.expand(function () {
	var self = Container.call(this);
	// Barrel
	var barrel = self.attachAsset('turretBarrel', {
		anchorX: 0.5,
		anchorY: 1,
		x: 0,
		y: 0
	});
	// Base
	var base = self.attachAsset('turretBase', {
		anchorX: 0.5,
		anchorY: 0,
		x: 0,
		y: 0
	});
	// For drag offset
	self.dragOffsetX = 0;
	// For firing cooldown
	self.canShoot = true;
	// Store barrel for aiming
	self.barrel = barrel;
	// Fire projectile toward (targetX, targetY)
	self.shoot = function (targetX, targetY) {
		if (!self.canShoot) return;
		self.canShoot = false;
		// Cooldown (fast)
		LK.setTimeout(function () {
			self.canShoot = true;
		}, 180);
		// If no target, shoot straight up
		var shootX = self.x;
		var shootY = self.y - barrel.height;
		var dx = 0,
			dy = -1;
		if (typeof targetX === "number" && typeof targetY === "number") {
			// Calculate direction from barrel tip to target
			var barrelTipX = self.x;
			var barrelTipY = self.y - barrel.height;
			dx = targetX - barrelTipX;
			dy = targetY - barrelTipY;
			// Prevent shooting downward
			if (dy > 0) {
				dx = 0;
				dy = -1;
			}
			// Aim barrel
			self.barrel.rotation = Math.atan2(dx, -dy);
		} else {
			// Reset barrel to straight up
			self.barrel.rotation = 0;
		}
		var proj = new Projectile();
		proj.x = self.x;
		proj.y = self.y - barrel.height;
		proj.setDirection(dx, dy);
		projectiles.push(proj);
		game.addChild(proj);
		LK.getSound('shoot').play();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x0a2233
});

/**** 
* Game Code
****/ 
// Game variables
// Turret: Defense cannon at the bottom
// Projectile: Player's bullet
// Meteor: Falling enemy
// Earth: Ground at the bottom
// Explosion effect (for future use)
// Sound effects
var turret;
var projectiles = [];
var meteors = [];
var earth;
var scoreTxt;
var livesTxt;
var dragNode = null;
var lastTouchX = 0;
var lives = 5;
var score = 0;
var meteorSpawnInterval = 60; // frames
var meteorSpeedBoost = 0; // increases as game progresses
var meteorTimer = 0;
// Add earth at the bottom
earth = LK.getAsset('earth', {
	anchorX: 0.5,
	anchorY: 1,
	x: 2048 / 2,
	y: 2732
});
game.addChild(earth);
// Add turret
turret = new Turret();
turret.x = 2048 / 2;
turret.y = 2732 - earth.height + 20;
game.addChild(turret);
// Score text (top center)
scoreTxt = new Text2('Score: 0', {
	size: 100,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Lives text (top right, avoid top left 100x100)
livesTxt = new Text2('Lives: 5', {
	size: 80,
	fill: 0xFFB300
});
livesTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(livesTxt);
// Handle dragging turret horizontally
game.down = function (x, y, obj) {
	// Only allow drag if touch is on or near the turret
	var local = game.toLocal({
		x: x,
		y: y
	});
	if (local.y > turret.y - 120 && local.y < turret.y + 80 && local.x > turret.x - 180 && local.x < turret.x + 180) {
		dragNode = turret;
		dragNode.dragOffsetX = local.x - turret.x;
		lastTouchX = local.x;
	}
};
game.move = function (x, y, obj) {
	if (dragNode) {
		var local = game.toLocal({
			x: x,
			y: y
		});
		var newX = local.x - dragNode.dragOffsetX;
		// Clamp within screen
		var minX = 110 + 60; // avoid left edge
		var maxX = 2048 - 60;
		dragNode.x = Math.max(minX, Math.min(maxX, newX));
		lastTouchX = local.x;
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Tap to shoot (anywhere on screen)
game.tap = function (x, y, obj) {
	// Convert to game coordinates
	var local = game.toLocal({
		x: x,
		y: y
	});
	turret.shoot(local.x, local.y);
};
// For touch devices, treat 'down' as tap if not dragging
game.down = function (origDown) {
	return function (x, y, obj) {
		origDown(x, y, obj);
		// If not dragging, treat as tap
		if (!dragNode) {
			var local = game.toLocal({
				x: x,
				y: y
			});
			turret.shoot(local.x, local.y);
		}
	};
}(game.down);
// Main update loop
game.update = function () {
	// Spawn meteors
	meteorTimer++;
	var spawnRate = Math.max(18, meteorSpawnInterval - Math.floor(score / 10) * 4);
	if (meteorTimer >= spawnRate) {
		meteorTimer = 0;
		var m = new Meteor();
		// Random X, avoid edges
		m.x = 120 + Math.random() * (2048 - 240);
		m.y = -80;
		meteors.push(m);
		game.addChild(m);
	}
	// Increase difficulty
	meteorSpeedBoost = Math.min(18, Math.floor(score / 8) * 2);
	// Update projectiles
	for (var i = projectiles.length - 1; i >= 0; i--) {
		var p = projectiles[i];
		p.update();
		// Remove if off screen
		if (p.y < -100) {
			p.destroy();
			projectiles.splice(i, 1);
			continue;
		}
		// Check collision with meteors
		for (var j = meteors.length - 1; j >= 0; j--) {
			var m = meteors[j];
			if (p.intersects(m)) {
				// Destroy both
				LK.getSound('hit').play();
				p.destroy();
				m.destroy();
				projectiles.splice(i, 1);
				meteors.splice(j, 1);
				score += 1;
				scoreTxt.setText('Score: ' + score);
				break;
			}
		}
	}
	// Update meteors
	for (var k = meteors.length - 1; k >= 0; k--) {
		var mtr = meteors[k];
		mtr.update();
		// If meteor hits earth
		if (mtr.y + 60 >= earth.y - earth.height / 2) {
			LK.getSound('lose').play();
			mtr.destroy();
			meteors.splice(k, 1);
			lives -= 1;
			livesTxt.setText('Lives: ' + lives);
			// Flash screen
			LK.effects.flashScreen(0xff0000, 400);
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -18,28 +18,121 @@
 		self.rotation += self.rotationSpeed;
 	};
 	return self;
 });
+// Projectile class: Player's bullet
+var Projectile = Container.expand(function () {
+	var self = Container.call(this);
+	var proj = self.attachAsset('projectile', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	// Default direction: straight up
+	self.vx = 0;
+	self.vy = -38;
+	self.setDirection = function (dx, dy) {
+		// Normalize and scale to projectile speed
+		var len = Math.sqrt(dx * dx + dy * dy);
+		if (len === 0) {
+			self.vx = 0;
+			self.vy = -38;
+		} else {
+			var speed = 38;
+			self.vx = dx / len * speed;
+			self.vy = dy / len * speed;
+		}
+		// Set rotation of projectile to match direction
+		self.rotation = Math.atan2(self.vx, -self.vy);
+	};
+	self.update = function () {
+		self.x += self.vx;
+		self.y += self.vy;
+	};
+	return self;
+});
+// Turret class: Player's cannon at the bottom
+var Turret = Container.expand(function () {
+	var self = Container.call(this);
+	// Barrel
+	var barrel = self.attachAsset('turretBarrel', {
+		anchorX: 0.5,
+		anchorY: 1,
+		x: 0,
+		y: 0
+	});
+	// Base
+	var base = self.attachAsset('turretBase', {
+		anchorX: 0.5,
+		anchorY: 0,
+		x: 0,
+		y: 0
+	});
+	// For drag offset
+	self.dragOffsetX = 0;
+	// For firing cooldown
+	self.canShoot = true;
+	// Store barrel for aiming
+	self.barrel = barrel;
+	// Fire projectile toward (targetX, targetY)
+	self.shoot = function (targetX, targetY) {
+		if (!self.canShoot) return;
+		self.canShoot = false;
+		// Cooldown (fast)
+		LK.setTimeout(function () {
+			self.canShoot = true;
+		}, 180);
+		// If no target, shoot straight up
+		var shootX = self.x;
+		var shootY = self.y - barrel.height;
+		var dx = 0,
+			dy = -1;
+		if (typeof targetX === "number" && typeof targetY === "number") {
+			// Calculate direction from barrel tip to target
+			var barrelTipX = self.x;
+			var barrelTipY = self.y - barrel.height;
+			dx = targetX - barrelTipX;
+			dy = targetY - barrelTipY;
+			// Prevent shooting downward
+			if (dy > 0) {
+				dx = 0;
+				dy = -1;
+			}
+			// Aim barrel
+			self.barrel.rotation = Math.atan2(dx, -dy);
+		} else {
+			// Reset barrel to straight up
+			self.barrel.rotation = 0;
+		}
+		var proj = new Projectile();
+		proj.x = self.x;
+		proj.y = self.y - barrel.height;
+		proj.setDirection(dx, dy);
+		projectiles.push(proj);
+		game.addChild(proj);
+		LK.getSound('shoot').play();
+	};
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
-// No projectile or turret classes needed
 var game = new LK.Game({
 	backgroundColor: 0x0a2233
 });
 
 /**** 
 * Game Code
 ****/ 
-// Sound effects
-// Explosion effect (for future use)
-// Earth: Ground at the bottom
-// Meteor: Falling enemy
-// Projectile: Player's bullet
-// Turret: Defense cannon at the bottom
 // Game variables
-// No turret or projectiles needed
+// Turret: Defense cannon at the bottom
+// Projectile: Player's bullet
+// Meteor: Falling enemy
+// Earth: Ground at the bottom
+// Explosion effect (for future use)
+// Sound effects
+var turret;
+var projectiles = [];
 var meteors = [];
 var earth;
 var scoreTxt;
 var livesTxt;
@@ -57,8 +150,13 @@
 	x: 2048 / 2,
 	y: 2732
 });
 game.addChild(earth);
+// Add turret
+turret = new Turret();
+turret.x = 2048 / 2;
+turret.y = 2732 - earth.height + 20;
+game.addChild(turret);
 // Score text (top center)
 scoreTxt = new Text2('Score: 0', {
 	size: 100,
 	fill: "#fff"
@@ -71,45 +169,61 @@
 	fill: 0xFFB300
 });
 livesTxt.anchor.set(1, 0);
 LK.gui.topRight.addChild(livesTxt);
-// Tap to destroy meteors
+// Handle dragging turret horizontally
+game.down = function (x, y, obj) {
+	// Only allow drag if touch is on or near the turret
+	var local = game.toLocal({
+		x: x,
+		y: y
+	});
+	if (local.y > turret.y - 120 && local.y < turret.y + 80 && local.x > turret.x - 180 && local.x < turret.x + 180) {
+		dragNode = turret;
+		dragNode.dragOffsetX = local.x - turret.x;
+		lastTouchX = local.x;
+	}
+};
+game.move = function (x, y, obj) {
+	if (dragNode) {
+		var local = game.toLocal({
+			x: x,
+			y: y
+		});
+		var newX = local.x - dragNode.dragOffsetX;
+		// Clamp within screen
+		var minX = 110 + 60; // avoid left edge
+		var maxX = 2048 - 60;
+		dragNode.x = Math.max(minX, Math.min(maxX, newX));
+		lastTouchX = local.x;
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Tap to shoot (anywhere on screen)
 game.tap = function (x, y, obj) {
+	// Convert to game coordinates
 	var local = game.toLocal({
 		x: x,
 		y: y
 	});
-	// Check for meteors under tap, from topmost to bottom
-	for (var i = meteors.length - 1; i >= 0; i--) {
-		var m = meteors[i];
-		// Use bounding box for tap detection
-		var dx = local.x - m.x;
-		var dy = local.y - m.y;
-		var r = 60; // meteor radius (half of 120)
-		if (dx * dx + dy * dy <= r * r) {
-			// Hit!
-			LK.getSound('hit').play();
-			m.destroy();
-			meteors.splice(i, 1);
-			score += 1;
-			scoreTxt.setText('Score: ' + score);
-			// Optional: explosion effect
-			var explosion = LK.getAsset('explosion', {
-				anchorX: 0.5,
-				anchorY: 0.5,
-				x: m.x,
-				y: m.y
+	turret.shoot(local.x, local.y);
+};
+// For touch devices, treat 'down' as tap if not dragging
+game.down = function (origDown) {
+	return function (x, y, obj) {
+		origDown(x, y, obj);
+		// If not dragging, treat as tap
+		if (!dragNode) {
+			var local = game.toLocal({
+				x: x,
+				y: y
 			});
-			game.addChild(explosion);
-			(function (exp) {
-				LK.setTimeout(function () {
-					exp.destroy();
-				}, 350);
-			})(explosion);
-			break;
+			turret.shoot(local.x, local.y);
 		}
-	}
-};
+	};
+}(game.down);
 // Main update loop
 game.update = function () {
 	// Spawn meteors
 	meteorTimer++;
@@ -124,9 +238,34 @@
 		game.addChild(m);
 	}
 	// Increase difficulty
 	meteorSpeedBoost = Math.min(18, Math.floor(score / 8) * 2);
-	// No projectile logic needed
+	// Update projectiles
+	for (var i = projectiles.length - 1; i >= 0; i--) {
+		var p = projectiles[i];
+		p.update();
+		// Remove if off screen
+		if (p.y < -100) {
+			p.destroy();
+			projectiles.splice(i, 1);
+			continue;
+		}
+		// Check collision with meteors
+		for (var j = meteors.length - 1; j >= 0; j--) {
+			var m = meteors[j];
+			if (p.intersects(m)) {
+				// Destroy both
+				LK.getSound('hit').play();
+				p.destroy();
+				m.destroy();
+				projectiles.splice(i, 1);
+				meteors.splice(j, 1);
+				score += 1;
+				scoreTxt.setText('Score: ' + score);
+				break;
+			}
+		}
+	}
 	// Update meteors
 	for (var k = meteors.length - 1; k >= 0; k--) {
 		var mtr = meteors[k];
 		mtr.update();