/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.targetPlanet = null;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		asteroidGraphics.rotation += 0.05;
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
	};
	return self;
});
var Planet = Container.expand(function (size, color, orbitRadius, orbitSpeed) {
	var self = Container.call(this);
	self.orbitRadius = orbitRadius;
	self.orbitSpeed = orbitSpeed;
	self.angle = Math.random() * Math.PI * 2;
	var assetName = 'mercury';
	if (color === 0x4169e1) assetName = 'earth';else if (color === 0xff4500) assetName = 'mars';else if (color === 0xffc649) assetName = 'venus';else if (color === 0xd2691e) assetName = 'jupiter';else if (color === 0xffd700) assetName = 'saturn';else if (color === 0x40e0d0) assetName = 'uranus';else if (color === 0x4169e1 && size === 85) assetName = 'neptune';
	var planetGraphics = self.attachAsset(assetName, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.angle += self.orbitSpeed;
		self.x = sunX + Math.cos(self.angle) * self.orbitRadius;
		self.y = sunY + Math.sin(self.angle) * self.orbitRadius;
	};
	return self;
});
var Ship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	self.placed = false;
	self.selected = false;
	self.targetAngle = 0;
	self.shootTimer = 0;
	self.down = function (x, y, obj) {
		if (!self.placed) {
			self.selected = true;
			selectedShip = self;
		}
	};
	self.update = function () {
		if (self.placed) {
			self.shootTimer++;
			if (self.shootTimer > 60) {
				var bullet = new Bullet();
				bullet.x = self.x;
				bullet.y = self.y;
				var speed = 5;
				bullet.velocityX = Math.cos(self.targetAngle) * speed;
				bullet.velocityY = Math.sin(self.targetAngle) * speed;
				bullets.push(bullet);
				game.addChild(bullet);
				self.shootTimer = 0;
			}
			shipGraphics.rotation = self.targetAngle;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var sunX = 2048 / 2;
var sunY = 2732 / 2;
var sun = game.addChild(LK.getAsset('sun', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: sunX,
	y: sunY
}));
var planets = [];
var mercury = new Planet(50, 0x8c7853, 150, 0.015);
var venus = new Planet(70, 0xffc649, 200, 0.012);
var earth = new Planet(80, 0x4169e1, 300, 0.008);
var mars = new Planet(60, 0xff4500, 450, 0.005);
var jupiter = new Planet(120, 0xd2691e, 600, 0.003);
var saturn = new Planet(100, 0xffd700, 750, 0.002);
var uranus = new Planet(90, 0x40e0d0, 900, 0.0015);
var neptune = new Planet(85, 0x4169e1, 1050, 0.001);
planets.push(mercury);
planets.push(venus);
planets.push(earth);
planets.push(mars);
planets.push(jupiter);
planets.push(saturn);
planets.push(uranus);
planets.push(neptune);
for (var i = 0; i < planets.length; i++) {
	game.addChild(planets[i]);
}
var bullets = [];
var asteroids = [];
var asteroidSpawnTimer = 0;
var lives = 4;
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
scoreTxt.x = -100;
LK.gui.top.addChild(scoreTxt);
var livesTxt = new Text2('Lives: 4', {
	size: 60,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(0, 0);
livesTxt.x = 100;
LK.gui.top.addChild(livesTxt);
var ships = [];
var selectedShip = null;
var shipSlots = [];
// Create 4 ship slots below score and lives
for (var i = 0; i < 4; i++) {
	var ship = new Ship();
	ship.x = -150 + i * 75;
	ship.y = 120;
	ships.push(ship);
	LK.gui.top.addChild(ship);
}
game.down = function (x, y, obj) {
	if (selectedShip && !selectedShip.placed) {
		// Place the ship
		selectedShip.destroy();
		var newShip = new Ship();
		newShip.x = x;
		newShip.y = y;
		newShip.placed = true;
		newShip.selected = false;
		game.addChild(newShip);
		ships.push(newShip);
		selectedShip = null;
	} else {
		// Check if clicking on a placed ship
		for (var i = 0; i < ships.length; i++) {
			if (ships[i].placed && ships[i].intersects({
				x: x,
				y: y,
				width: 10,
				height: 10
			})) {
				selectedShip = ships[i];
				selectedShip.selected = true;
				return;
			}
		}
		// If a ship is selected and we click elsewhere, aim it
		if (selectedShip && selectedShip.placed) {
			var dx = x - selectedShip.x;
			var dy = y - selectedShip.y;
			selectedShip.targetAngle = Math.atan2(dy, dx);
			tween(selectedShip, {
				rotation: selectedShip.targetAngle
			}, {
				duration: 200
			});
			selectedShip.selected = false;
			selectedShip = null;
		}
	}
};
game.update = function () {
	for (var i = 0; i < planets.length; i++) {
		planets[i].update();
	}
	for (var i = 0; i < ships.length; i++) {
		if (ships[i].placed) {
			ships[i].update();
		}
	}
	asteroidSpawnTimer++;
	if (asteroidSpawnTimer > 120) {
		var asteroid = new Asteroid();
		var spawnAngle = Math.random() * Math.PI * 2;
		var spawnDistance = 1500;
		asteroid.x = sunX + Math.cos(spawnAngle) * spawnDistance;
		asteroid.y = sunY + Math.sin(spawnAngle) * spawnDistance;
		// Set initial velocity toward Earth's current position
		var dx = earth.x - asteroid.x;
		var dy = earth.y - asteroid.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			asteroid.velocityX = dx / distance * 2;
			asteroid.velocityY = dy / distance * 2;
		}
		asteroids.push(asteroid);
		game.addChild(asteroid);
		asteroidSpawnTimer = 0;
	}
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		for (var j = asteroids.length - 1; j >= 0; j--) {
			if (bullet.intersects(asteroids[j])) {
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText('Score: ' + LK.getScore());
				LK.getSound('explosion').play();
				bullet.destroy();
				bullets.splice(i, 1);
				asteroids[j].destroy();
				asteroids.splice(j, 1);
				break;
			}
		}
	}
	for (var i = asteroids.length - 1; i >= 0; i--) {
		var asteroid = asteroids[i];
		for (var j = 0; j < planets.length; j++) {
			if (asteroid.intersects(planets[j])) {
				if (planets[j] === earth) {
					LK.effects.flashScreen(0xff0000, 1000);
					lives--;
					livesTxt.setText('Lives: ' + lives);
					if (lives <= 0) {
						LK.showGameOver();
						return;
					}
				}
				asteroid.destroy();
				asteroids.splice(i, 1);
				break;
			}
		}
		var distanceFromSun = Math.sqrt(Math.pow(asteroid.x - sunX, 2) + Math.pow(asteroid.y - sunY, 2));
		if (distanceFromSun < 120) {
			asteroid.destroy();
			asteroids.splice(i, 1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -53,8 +53,45 @@
 		self.y = sunY + Math.sin(self.angle) * self.orbitRadius;
 	};
 	return self;
 });
+var Ship = Container.expand(function () {
+	var self = Container.call(this);
+	var shipGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 2,
+		scaleY: 2
+	});
+	self.placed = false;
+	self.selected = false;
+	self.targetAngle = 0;
+	self.shootTimer = 0;
+	self.down = function (x, y, obj) {
+		if (!self.placed) {
+			self.selected = true;
+			selectedShip = self;
+		}
+	};
+	self.update = function () {
+		if (self.placed) {
+			self.shootTimer++;
+			if (self.shootTimer > 60) {
+				var bullet = new Bullet();
+				bullet.x = self.x;
+				bullet.y = self.y;
+				var speed = 5;
+				bullet.velocityX = Math.cos(self.targetAngle) * speed;
+				bullet.velocityY = Math.sin(self.targetAngle) * speed;
+				bullets.push(bullet);
+				game.addChild(bullet);
+				self.shootTimer = 0;
+			}
+			shipGraphics.rotation = self.targetAngle;
+		}
+	};
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -110,12 +147,69 @@
 });
 livesTxt.anchor.set(0, 0);
 livesTxt.x = 100;
 LK.gui.top.addChild(livesTxt);
+var ships = [];
+var selectedShip = null;
+var shipSlots = [];
+// Create 4 ship slots below score and lives
+for (var i = 0; i < 4; i++) {
+	var ship = new Ship();
+	ship.x = -150 + i * 75;
+	ship.y = 120;
+	ships.push(ship);
+	LK.gui.top.addChild(ship);
+}
+game.down = function (x, y, obj) {
+	if (selectedShip && !selectedShip.placed) {
+		// Place the ship
+		selectedShip.destroy();
+		var newShip = new Ship();
+		newShip.x = x;
+		newShip.y = y;
+		newShip.placed = true;
+		newShip.selected = false;
+		game.addChild(newShip);
+		ships.push(newShip);
+		selectedShip = null;
+	} else {
+		// Check if clicking on a placed ship
+		for (var i = 0; i < ships.length; i++) {
+			if (ships[i].placed && ships[i].intersects({
+				x: x,
+				y: y,
+				width: 10,
+				height: 10
+			})) {
+				selectedShip = ships[i];
+				selectedShip.selected = true;
+				return;
+			}
+		}
+		// If a ship is selected and we click elsewhere, aim it
+		if (selectedShip && selectedShip.placed) {
+			var dx = x - selectedShip.x;
+			var dy = y - selectedShip.y;
+			selectedShip.targetAngle = Math.atan2(dy, dx);
+			tween(selectedShip, {
+				rotation: selectedShip.targetAngle
+			}, {
+				duration: 200
+			});
+			selectedShip.selected = false;
+			selectedShip = null;
+		}
+	}
+};
 game.update = function () {
 	for (var i = 0; i < planets.length; i++) {
 		planets[i].update();
 	}
+	for (var i = 0; i < ships.length; i++) {
+		if (ships[i].placed) {
+			ships[i].update();
+		}
+	}
 	asteroidSpawnTimer++;
 	if (asteroidSpawnTimer > 120) {
 		var asteroid = new Asteroid();
 		var spawnAngle = Math.random() * Math.PI * 2;