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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = 0;
	self.speedY = 0;
	self.speed = 12;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.moveSpeed = 1 + Math.random() * 2;
	self.directionX = (Math.random() - 0.5) * 2;
	self.directionY = (Math.random() - 0.5) * 2;
	self.update = function () {
		self.x += self.directionX * self.moveSpeed;
		self.y += self.directionY * self.moveSpeed;
		// Bounce off walls
		if (self.x <= 30 || self.x >= 2018) {
			self.directionX *= -1;
		}
		if (self.y <= 30 || self.y >= 2702) {
			self.directionY *= -1;
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.isReady = true;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
var player = game.addChild(new Player());
player.x = 1024;
player.y = 2500;
var bullets = [];
var enemies = [];
var enemySpawnTimer = 0;
var difficultyTimer = 0;
var baseSpawnRate = 180; // frames between spawns
var currentSpawnRate = baseSpawnRate;
var maxAmmo = 20;
var currentAmmo = maxAmmo;
var maxEnemies = 18;
var enemiesSpawned = 0;
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var readyIndicator = new Text2('READY', {
	size: 60,
	fill: 0x00FF00
});
readyIndicator.anchor.set(0.5, 0.5);
LK.gui.center.addChild(readyIndicator);
var ammoTxt = new Text2('Ammo: 20', {
	size: 60,
	fill: 0xFFFFFF
});
ammoTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(ammoTxt);
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
}
function updateAmmo() {
	ammoTxt.setText('Ammo: ' + currentAmmo);
}
function spawnEnemy() {
	if (enemiesSpawned >= maxEnemies) return;
	var enemy = new Enemy();
	// Spawn only from top (opposite direction)
	enemy.x = Math.random() * 2048;
	enemy.y = -30;
	// Set enemy to move toward bottom
	enemy.directionX = (Math.random() - 0.5) * 0.5;
	enemy.directionY = 1; // Always move down
	enemies.push(enemy);
	game.addChild(enemy);
	enemiesSpawned++;
	LK.getSound('enemySpawn').play();
}
function shootBullet(targetX, targetY) {
	if (!player.isReady || currentAmmo <= 0) return;
	currentAmmo--;
	updateAmmo();
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	// Calculate direction to target
	var dx = targetX - player.x;
	var dy = targetY - player.y;
	var distance = Math.sqrt(dx * dx + dy * dy);
	// Normalize and set speed
	bullet.speedX = dx / distance * bullet.speed;
	bullet.speedY = dy / distance * bullet.speed;
	bullets.push(bullet);
	game.addChild(bullet);
	player.isReady = false;
	readyIndicator.setText('SHOOTING');
	readyIndicator.tint = 0xff0000;
	LK.getSound('shoot').play();
}
function returnBulletToPlayer(bullet) {
	// Animate bullet returning to player
	tween(bullet, {
		x: player.x,
		y: player.y
	}, {
		duration: 300,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			bullet.destroy();
			var index = bullets.indexOf(bullet);
			if (index > -1) {
				bullets.splice(index, 1);
			}
			player.isReady = true;
			readyIndicator.setText('READY');
			readyIndicator.tint = 0x00ff00;
		}
	});
}
game.down = function (x, y, obj) {
	if (player.isReady) {
		shootBullet(x, y);
	}
};
game.update = function () {
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Check if bullet is off screen
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			returnBulletToPlayer(bullet);
			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)) {
				// Hit enemy
				LK.setScore(LK.getScore() + 10);
				updateScore();
				// Flash effect on enemy
				LK.effects.flashObject(enemy, 0xffffff, 200);
				// Remove enemy
				enemy.destroy();
				enemies.splice(j, 1);
				// Return bullet to player
				returnBulletToPlayer(bullet);
				hitEnemy = true;
				LK.getSound('hit').play();
				break;
			}
		}
		if (hitEnemy) break;
	}
	// Check if player collides with enemies
	for (var k = 0; k < enemies.length; k++) {
		var enemy = enemies[k];
		if (player.intersects(enemy)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// Spawn enemies
	enemySpawnTimer++;
	if (enemySpawnTimer >= currentSpawnRate && enemiesSpawned < maxEnemies) {
		spawnEnemy();
		enemySpawnTimer = 0;
	}
	// Increase difficulty over time
	difficultyTimer++;
	if (difficultyTimer >= 600) {
		// Every 10 seconds
		if (currentSpawnRate > 60) {
			currentSpawnRate -= 5;
		}
		difficultyTimer = 0;
	}
	// Check if game should end (no ammo and no bullets in flight)
	if (currentAmmo <= 0 && bullets.length === 0) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
		return;
	}
	// Check win condition (all enemies destroyed)
	if (enemiesSpawned >= maxEnemies && enemies.length === 0) {
		LK.showYouWin();
		return;
	}
	// Limit number of enemies on screen
	if (enemies.length > 15) {
		var oldestEnemy = enemies.shift();
		oldestEnemy.destroy();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -71,8 +71,12 @@
 var enemySpawnTimer = 0;
 var difficultyTimer = 0;
 var baseSpawnRate = 180; // frames between spawns
 var currentSpawnRate = baseSpawnRate;
+var maxAmmo = 20;
+var currentAmmo = maxAmmo;
+var maxEnemies = 18;
+var enemiesSpawned = 0;
 // UI Elements
 var scoreTxt = new Text2('Score: 0', {
 	size: 80,
 	fill: 0xFFFFFF
@@ -84,43 +88,38 @@
 	fill: 0x00FF00
 });
 readyIndicator.anchor.set(0.5, 0.5);
 LK.gui.center.addChild(readyIndicator);
+var ammoTxt = new Text2('Ammo: 20', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+ammoTxt.anchor.set(1, 0);
+LK.gui.topRight.addChild(ammoTxt);
 function updateScore() {
 	scoreTxt.setText('Score: ' + LK.getScore());
 }
+function updateAmmo() {
+	ammoTxt.setText('Ammo: ' + currentAmmo);
+}
 function spawnEnemy() {
+	if (enemiesSpawned >= maxEnemies) return;
 	var enemy = new Enemy();
-	// Spawn from edges of screen
-	var side = Math.floor(Math.random() * 4);
-	switch (side) {
-		case 0:
-			// top
-			enemy.x = Math.random() * 2048;
-			enemy.y = -30;
-			break;
-		case 1:
-			// right
-			enemy.x = 2078;
-			enemy.y = Math.random() * 2732;
-			break;
-		case 2:
-			// bottom
-			enemy.x = Math.random() * 2048;
-			enemy.y = 2762;
-			break;
-		case 3:
-			// left
-			enemy.x = -30;
-			enemy.y = Math.random() * 2732;
-			break;
-	}
+	// Spawn only from top (opposite direction)
+	enemy.x = Math.random() * 2048;
+	enemy.y = -30;
+	// Set enemy to move toward bottom
+	enemy.directionX = (Math.random() - 0.5) * 0.5;
+	enemy.directionY = 1; // Always move down
 	enemies.push(enemy);
 	game.addChild(enemy);
+	enemiesSpawned++;
 	LK.getSound('enemySpawn').play();
 }
 function shootBullet(targetX, targetY) {
-	if (!player.isReady) return;
+	if (!player.isReady || currentAmmo <= 0) return;
+	currentAmmo--;
+	updateAmmo();
 	var bullet = new Bullet();
 	bullet.x = player.x;
 	bullet.y = player.y;
 	// Calculate direction to target
@@ -203,9 +202,9 @@
 		}
 	}
 	// Spawn enemies
 	enemySpawnTimer++;
-	if (enemySpawnTimer >= currentSpawnRate) {
+	if (enemySpawnTimer >= currentSpawnRate && enemiesSpawned < maxEnemies) {
 		spawnEnemy();
 		enemySpawnTimer = 0;
 	}
 	// Increase difficulty over time
@@ -216,8 +215,19 @@
 			currentSpawnRate -= 5;
 		}
 		difficultyTimer = 0;
 	}
+	// Check if game should end (no ammo and no bullets in flight)
+	if (currentAmmo <= 0 && bullets.length === 0) {
+		LK.effects.flashScreen(0xff0000, 1000);
+		LK.showGameOver();
+		return;
+	}
+	// Check win condition (all enemies destroyed)
+	if (enemiesSpawned >= maxEnemies && enemies.length === 0) {
+		LK.showYouWin();
+		return;
+	}
 	// Limit number of enemies on screen
 	if (enemies.length > 15) {
 		var oldestEnemy = enemies.shift();
 		oldestEnemy.destroy();