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

/**** 
* Classes
****/ 
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyJet = Container.expand(function () {
	var self = Container.call(this);
	var jetGraphics = self.attachAsset('enemyJet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	jetGraphics.rotation = Math.PI;
	self.speed = 3;
	self.health = 1;
	self.lastShot = 0;
	self.shootInterval = 90;
	self.update = function () {
		self.y += self.speed;
		// Enemy shooting logic
		self.lastShot++;
		if (self.lastShot >= self.shootInterval && self.y > 100 && self.y < 2500) {
			self.lastShot = 0;
			var newBullet = new EnemyBullet();
			newBullet.x = self.x;
			newBullet.y = self.y + 40;
			enemyBullets.push(newBullet);
			game.addChild(newBullet);
		}
	};
	return self;
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.attachAsset('missile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -8;
	self.target = null;
	self.homingStrength = 0.1;
	self.update = function () {
		// Find closest enemy if no target or target is destroyed
		if (!self.target || self.target.destroyed) {
			var closestDistance = Infinity;
			self.target = null;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var distance = Math.sqrt(Math.pow(enemy.x - self.x, 2) + Math.pow(enemy.y - self.y, 2));
				if (distance < closestDistance) {
					closestDistance = distance;
					self.target = enemy;
				}
			}
		}
		// Homing behavior
		if (self.target && !self.target.destroyed) {
			var dx = self.target.x - self.x;
			var dy = self.target.y - self.y;
			self.x += dx * self.homingStrength;
			self.y += dy * self.homingStrength;
		}
		self.y += self.speed;
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerJet = Container.expand(function () {
	var self = Container.call(this);
	var jetGraphics = self.attachAsset('playerJet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.lastShot = 0;
	self.shootInterval = 15;
	self.update = function () {
		// Auto shooting
		self.lastShot++;
		if (self.lastShot >= self.shootInterval) {
			self.lastShot = 0;
			var newBullet = new PlayerBullet();
			newBullet.x = self.x;
			newBullet.y = self.y - 50;
			playerBullets.push(newBullet);
			game.addChild(newBullet);
			LK.getSound('shoot').play();
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a237e
});

/**** 
* Game Code
****/ 
var player = game.addChild(new PlayerJet());
player.x = 1024;
player.y = 2400;
var enemies = [];
var playerBullets = [];
var enemyBullets = [];
var missiles = [];
var enemySpawnTimer = 0;
var waveLevel = 1;
var dragNode = null;
var enemiesKilled = 0;
var missileCount = 0;
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var healthTxt = new Text2('Health: 3', {
	size: 60,
	fill: 0xFF4444
});
healthTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(healthTxt);
var missileTxt = new Text2('Missiles: 0', {
	size: 60,
	fill: 0xFF9500
});
missileTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(missileTxt);
missileTxt.x = 120;
function spawnEnemy() {
	var enemy = new EnemyJet();
	enemy.x = Math.random() * 1800 + 124;
	enemy.y = -100;
	enemy.speed = 2 + Math.random() * 3 + waveLevel * 0.5;
	enemy.shootInterval = Math.max(60, 120 - waveLevel * 5);
	enemies.push(enemy);
	game.addChild(enemy);
}
function handleMove(x, y, obj) {
	if (dragNode) {
		dragNode.x = Math.max(60, Math.min(1988, x));
		dragNode.y = Math.max(100, Math.min(2632, y));
	}
}
var lastTapTime = 0;
var tapThreshold = 300;
var isReloading = false;
var reloadTime = 2000; // 2 seconds reload time
var reloadStartTime = 0;
game.move = handleMove;
game.down = function (x, y, obj) {
	var currentTime = Date.now();
	if (currentTime - lastTapTime < tapThreshold) {
		// Double tap detected
		if (missileCount > 0 && !isReloading) {
			// Fire missile
			var newMissile = new Missile();
			newMissile.x = player.x;
			newMissile.y = player.y - 50;
			missiles.push(newMissile);
			game.addChild(newMissile);
			missileCount--;
			missileTxt.setText('Missiles: ' + missileCount);
			LK.getSound('missileShoot').play();
		} else if (missileCount === 0 && !isReloading) {
			// Start reload
			isReloading = true;
			reloadStartTime = currentTime;
			missileTxt.setText('Missiles: Reloading...');
			LK.effects.flashScreen(0x0088ff, 300);
		}
		lastTapTime = 0;
	} else {
		lastTapTime = currentTime;
		dragNode = player;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	// Handle missile reload
	if (isReloading) {
		var currentTime = Date.now();
		if (currentTime - reloadStartTime >= reloadTime) {
			isReloading = false;
			missileCount = 1;
			missileTxt.setText('Missiles: ' + missileCount);
			LK.effects.flashScreen(0x00ff00, 300);
		}
	}
	// Spawn enemies
	enemySpawnTimer++;
	var spawnRate = Math.max(30, 90 - waveLevel * 5);
	if (enemySpawnTimer >= spawnRate) {
		enemySpawnTimer = 0;
		spawnEnemy();
		// Increase difficulty every 10 enemies spawned
		if (LK.ticks % 600 === 0) {
			waveLevel++;
		}
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Enemy hit
				LK.setScore(LK.getScore() + 100);
				scoreTxt.setText('Score: ' + LK.getScore());
				LK.getSound('enemyHit').play();
				// Track enemy kills for missile unlock
				enemiesKilled++;
				if (enemiesKilled % 10 === 0) {
					missileCount++;
					missileTxt.setText('Missiles: ' + missileCount);
					LK.effects.flashScreen(0x00ff00, 500);
				}
				// Remove enemy and bullet
				enemy.destroy();
				enemies.splice(j, 1);
				bullet.destroy();
				playerBullets.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			bullet.lastY = bullet.y;
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.y > 2800) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bullet.intersects(player)) {
			player.health--;
			healthTxt.setText('Health: ' + player.health);
			LK.getSound('explosion').play();
			LK.effects.flashObject(player, 0xff0000, 500);
			bullet.destroy();
			enemyBullets.splice(i, 1);
			if (player.health <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove enemies that go off screen
		if (enemy.y > 2800) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (enemy.intersects(player)) {
			player.health--;
			healthTxt.setText('Health: ' + player.health);
			LK.getSound('explosion').play();
			LK.effects.flashObject(player, 0xff0000, 500);
			enemy.destroy();
			enemies.splice(i, 1);
			if (player.health <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		enemy.lastY = enemy.y;
	}
	// Update missiles
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		if (missile.lastY === undefined) missile.lastY = missile.y;
		// Remove missiles that go off screen
		if (missile.y < -50) {
			missile.destroy();
			missiles.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (missile.intersects(enemy)) {
				// Enemy hit by missile
				LK.setScore(LK.getScore() + 200);
				scoreTxt.setText('Score: ' + LK.getScore());
				LK.getSound('enemyHit').play();
				// Track enemy kills for missile unlock
				enemiesKilled++;
				if (enemiesKilled % 10 === 0) {
					missileCount++;
					missileTxt.setText('Missiles: ' + missileCount);
					LK.effects.flashScreen(0x00ff00, 500);
				}
				// Remove enemy and missile
				enemy.destroy();
				enemies.splice(j, 1);
				missile.destroy();
				missiles.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			missile.lastY = missile.y;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -172,21 +172,33 @@
 	}
 }
 var lastTapTime = 0;
 var tapThreshold = 300;
+var isReloading = false;
+var reloadTime = 2000; // 2 seconds reload time
+var reloadStartTime = 0;
 game.move = handleMove;
 game.down = function (x, y, obj) {
 	var currentTime = Date.now();
-	if (currentTime - lastTapTime < tapThreshold && missileCount > 0) {
-		// Double tap detected - fire missile
-		var newMissile = new Missile();
-		newMissile.x = player.x;
-		newMissile.y = player.y - 50;
-		missiles.push(newMissile);
-		game.addChild(newMissile);
-		missileCount--;
-		missileTxt.setText('Missiles: ' + missileCount);
-		LK.getSound('missileShoot').play();
+	if (currentTime - lastTapTime < tapThreshold) {
+		// Double tap detected
+		if (missileCount > 0 && !isReloading) {
+			// Fire missile
+			var newMissile = new Missile();
+			newMissile.x = player.x;
+			newMissile.y = player.y - 50;
+			missiles.push(newMissile);
+			game.addChild(newMissile);
+			missileCount--;
+			missileTxt.setText('Missiles: ' + missileCount);
+			LK.getSound('missileShoot').play();
+		} else if (missileCount === 0 && !isReloading) {
+			// Start reload
+			isReloading = true;
+			reloadStartTime = currentTime;
+			missileTxt.setText('Missiles: Reloading...');
+			LK.effects.flashScreen(0x0088ff, 300);
+		}
 		lastTapTime = 0;
 	} else {
 		lastTapTime = currentTime;
 		dragNode = player;
@@ -196,8 +208,18 @@
 game.up = function (x, y, obj) {
 	dragNode = null;
 };
 game.update = function () {
+	// Handle missile reload
+	if (isReloading) {
+		var currentTime = Date.now();
+		if (currentTime - reloadStartTime >= reloadTime) {
+			isReloading = false;
+			missileCount = 1;
+			missileTxt.setText('Missiles: ' + missileCount);
+			LK.effects.flashScreen(0x00ff00, 300);
+		}
+	}
 	// Spawn enemies
 	enemySpawnTimer++;
 	var spawnRate = Math.max(30, 90 - waveLevel * 5);
 	if (enemySpawnTimer >= spawnRate) {