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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.active = true;
	self.width = enemyGraphics.width;
	self.height = enemyGraphics.height;
	self.points = 10;
	self.shotChance = 0.005; // Chance per frame to shoot
	self.update = function () {
		// Enemy logic will be controlled by the formation
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8; // Positive because it moves downward
	self.active = false;
	self.visible = false;
	self.width = bulletGraphics.width;
	self.height = bulletGraphics.height;
	self.reset = function (x, y) {
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
	};
	self.update = function () {
		self.y += self.speed;
		// Deactivate when off screen
		if (self.y > 2732 + self.height) {
			self.active = false;
			self.visible = false;
		}
	};
	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 = -15; // Negative because it moves upward
	self.active = false;
	self.visible = false;
	self.width = bulletGraphics.width;
	self.height = bulletGraphics.height;
	self.reset = function (x, y) {
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
	};
	self.update = function () {
		self.y += self.speed;
		// Deactivate when off screen
		if (self.y < -self.height) {
			self.active = false;
			self.visible = false;
		}
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12;
	self.width = shipGraphics.width;
	self.height = shipGraphics.height;
	self.fireRate = 15; // frames between shots
	self.lastShot = 0;
	self.alive = true;
	self.moveLeft = function () {
		self.x -= self.speed;
		if (self.x < self.width / 2) {
			self.x = self.width / 2;
		}
	};
	self.moveRight = function () {
		self.x += self.speed;
		if (self.x > 2048 - self.width / 2) {
			self.x = 2048 - self.width / 2;
		}
	};
	self.canShoot = function () {
		return self.lastShot <= 0;
	};
	self.resetShotTimer = function () {
		self.lastShot = self.fireRate;
	};
	self.update = function () {
		if (self.lastShot > 0) {
			self.lastShot--;
		}
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	// Default values
	self.type = "none";
	self.speed = 3;
	self.active = false;
	self.visible = false;
	self.width = 80;
	self.height = 80;
	// Create base graphics container that will hold the powerup visual
	var graphics = new Container();
	self.addChild(graphics);
	// Initialize with specific type
	self.init = function (type, x, y) {
		self.type = type;
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
		// Clear previous graphics
		while (graphics.children.length > 0) {
			graphics.removeChild(graphics.children[0]);
		}
		// Create visuals based on type
		if (type === "extraLife") {
			var heart = LK.getAsset('shield', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0xff0000 // Red heart
			});
			graphics.addChild(heart);
		} else if (type === "weaponUpgrade") {
			var weapon = LK.getAsset('playerBullet', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0xffff00 // Yellow weapon upgrade
			});
			graphics.addChild(weapon);
		} else if (type === "shield") {
			var shield = LK.getAsset('shield', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0x00ffff // Cyan shield
			});
			graphics.addChild(shield);
		}
		// Apply a pulsing effect to make powerups stand out
		self.pulseEffect();
	};
	// Pulsing animation effect
	self.pulseEffect = function () {
		tween.to(graphics, 0.5, {
			scaleX: 1.2,
			scaleY: 1.2,
			onComplete: function onComplete() {
				tween.to(graphics, 0.5, {
					scaleX: 1.0,
					scaleY: 1.0,
					onComplete: self.pulseEffect
				});
			}
		});
	};
	// Update powerup position - move downward
	self.update = function () {
		if (self.active) {
			self.y += self.speed;
			// Deactivate when off screen
			if (self.y > GAME_HEIGHT + self.height) {
				self.active = false;
				self.visible = false;
			}
		}
	};
	return self;
});
var Shield = Container.expand(function () {
	var self = Container.call(this);
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.width = shieldGraphics.width;
	self.height = shieldGraphics.height;
	self.damage = function () {
		self.health--;
		shieldGraphics.alpha = self.health / 3;
		if (self.health <= 0) {
			self.active = false;
			self.visible = false;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000022
});

/**** 
* Game Code
****/ 
// Game constants
var BulletPool = function BulletPool(bulletType, maxSize) {
	var pool = [];
	var self = this;
	// Pre-create bullets
	for (var i = 0; i < maxSize; i++) {
		var bullet = new bulletType();
		bullet.visible = false;
		bullet.active = false;
		pool.push(bullet);
	}
	self.getBullet = function () {
		for (var i = 0; i < pool.length; i++) {
			if (!pool[i].active) {
				pool[i].active = true;
				pool[i].visible = true;
				return pool[i];
			}
		}
		return null; // No bullets available
	};
	self.getAll = function () {
		return pool;
	};
};
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var PLAYER_START_Y = GAME_HEIGHT - 200;
var SHIELD_Y = PLAYER_START_Y - 150;
var ENEMY_START_Y = 300;
var ENEMY_ROWS = 5;
var ENEMY_COLS = 10;
var ENEMY_PADDING = 20;
var ENEMIES_MOVE_DOWN_AMOUNT = 30;
var WAVE_SPEED_INCREASE = 0.2;
// Game state
var player;
var playerBulletPool;
var enemyBulletPool;
var powerUpManager;
var activePlayerBullets = 0;
var activeEnemyBullets = 0;
var enemies = [];
var shields = [];
var score = 0;
var lives = 3;
var wave = 1;
var enemiesDirection = 1; // 1 = right, -1 = left
var enemiesSpeed = 1;
var enemyMoveTimer = 0;
var enemyMoveInterval = 30; // Frames between enemy movement
var gameState = "playing"; // playing, gameover
var dragActive = false;
var dragStartX = 0;
var lastFrameTime = Date.now();
var frameTime = 0;
// UI elements
var scoreTxt;
var livesTxt;
var waveTxt;
// Initialize player
player = new PlayerShip();
player.x = GAME_WIDTH / 2;
player.y = PLAYER_START_Y;
game.addChild(player);
// Initialize bullet pools
playerBulletPool = new BulletPool(PlayerBullet, 20);
enemyBulletPool = new BulletPool(EnemyBullet, 50);
// Initialize power-up manager
powerUpManager = new PowerUpManager();
// Add all bullets to the game
var allPlayerBullets = playerBulletPool.getAll();
var allEnemyBullets = enemyBulletPool.getAll();
for (var i = 0; i < allPlayerBullets.length; i++) {
	game.addChild(allPlayerBullets[i]);
}
for (var i = 0; i < allEnemyBullets.length; i++) {
	game.addChild(allEnemyBullets[i]);
}
// Initialize shields
for (var i = 0; i < 3; i++) {
	var shield = new Shield();
	shield.x = GAME_WIDTH / 4 + GAME_WIDTH / 2 * (i / 2);
	shield.y = SHIELD_Y;
	shield.active = true;
	shields.push(shield);
	game.addChild(shield);
}
// Create UI
scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
scoreTxt.x = 20;
scoreTxt.y = 20;
LK.gui.addChild(scoreTxt);
livesTxt = new Text2('Lives: 3', {
	size: 60,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(1, 0);
livesTxt.x = GAME_WIDTH - 20;
livesTxt.y = 20;
LK.gui.addChild(livesTxt);
waveTxt = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveTxt.anchor.set(0.5, 0);
waveTxt.x = GAME_WIDTH / 2;
waveTxt.y = 20;
LK.gui.addChild(waveTxt);
// Create enemies
function createEnemies() {
	// Calculate total width of enemy formation
	var enemyWidth = new Enemy().width;
	var formationWidth = ENEMY_COLS * (enemyWidth + ENEMY_PADDING) - ENEMY_PADDING;
	var startX = (GAME_WIDTH - formationWidth) / 2 + enemyWidth / 2;
	for (var row = 0; row < ENEMY_ROWS; row++) {
		for (var col = 0; col < ENEMY_COLS; col++) {
			var enemy = new Enemy();
			enemy.x = startX + col * (enemy.width + ENEMY_PADDING);
			enemy.y = ENEMY_START_Y + row * (enemy.height + ENEMY_PADDING);
			enemy.row = row;
			enemy.col = col;
			enemy.points = (ENEMY_ROWS - row) * 10; // Higher rows worth more points
			// Different enemy colors based on row
			if (row === 0) {
				enemy.children[0].tint = 0xff0000; // Top row red
			} else if (row === 1 || row === 2) {
				enemy.children[0].tint = 0xff6600; // Middle rows orange
			}
			enemies.push(enemy);
			game.addChild(enemy);
		}
	}
}
createEnemies();
// Play background music
LK.playMusic('bgMusic', {
	loop: true
});
// Game control event handlers
game.down = function (x, y, obj) {
	dragActive = true;
	dragStartX = x;
};
game.up = function (x, y, obj) {
	dragActive = false;
};
game.move = function (x, y, obj) {
	if (dragActive && gameState === "playing") {
		// Move player based on drag
		var deltaX = x - dragStartX;
		if (Math.abs(deltaX) > 5) {
			// Threshold to prevent jitter
			if (deltaX > 0) {
				player.moveRight();
			} else {
				player.moveLeft();
			}
			dragStartX = x;
		}
	}
};
// Create player bullet
function shootPlayerBullet() {
	if (player.canShoot() && gameState === "playing") {
		var bullet = playerBulletPool.getBullet();
		if (bullet) {
			bullet.reset(player.x, player.y - player.height / 2);
			activePlayerBullets++;
			player.resetShotTimer();
			// Play shoot sound
			LK.getSound('playerShoot').play();
		}
	}
}
// Create enemy bullet
function shootEnemyBullet(enemy) {
	var bullet = enemyBulletPool.getBullet();
	if (bullet) {
		bullet.reset(enemy.x, enemy.y + enemy.height / 2);
		activeEnemyBullets++;
	}
}
// Check if formation needs to move down and change direction
function checkFormationBounds() {
	var moveDown = false;
	var minX = GAME_WIDTH;
	var maxX = 0;
	var enemyWidth = 0;
	// Check if there are any enemies before proceeding
	if (enemies.length === 0) {
		return false;
	}
	enemies.forEach(function (enemy) {
		if (enemy.x < minX) minX = enemy.x;
		if (enemy.x > maxX) maxX = enemy.x;
		enemyWidth = enemy.width; // Store width from any enemy for boundary checking
	});
	// Using enemyWidth which is now properly set from actual enemies
	if (minX < enemyWidth / 2 && enemiesDirection === -1 || maxX > GAME_WIDTH - enemyWidth / 2 && enemiesDirection === 1) {
		moveDown = true;
		enemiesDirection *= -1;
	}
	return moveDown;
}
// Move enemy formation
function moveEnemies() {
	var moveDown = checkFormationBounds();
	enemies.forEach(function (enemy) {
		if (moveDown) {
			enemy.y += ENEMIES_MOVE_DOWN_AMOUNT;
		}
		enemy.x += enemiesDirection * enemiesSpeed;
	});
}
// Check for collisions
function checkCollisions() {
	var allPlayerBullets = playerBulletPool.getAll();
	var allEnemyBullets = enemyBulletPool.getAll();
	// Player bullets vs enemies
	for (var i = 0; i < allPlayerBullets.length; i++) {
		var bullet = allPlayerBullets[i];
		if (!bullet.active) continue;
		// Check if bullet hits any enemy - using a more efficient method
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Enemy hit
				score += enemy.points;
				scoreTxt.setText("Score: " + score);
				// Create a powerup with a certain chance
				var enemyX = enemy.x;
				var enemyY = enemy.y;
				// Remove enemy
				game.removeChild(enemy);
				enemies.splice(j, 1);
				// Try to spawn a power-up at enemy position
				powerUpManager.createPowerUp(enemyX, enemyY);
				// Deactivate bullet
				bullet.active = false;
				bullet.visible = false;
				activePlayerBullets--;
				// Play explosion sound
				LK.getSound('enemyExplode').play();
				// Flash screen effect
				LK.effects.flashObject(enemy, 0xffffff, 300);
				hitEnemy = true;
				break; // Bullet can only hit one enemy
			}
		}
		// Check if bullet hits any shield (only if it didn't hit an enemy)
		if (!hitEnemy && bullet.active) {
			for (var k = shields.length - 1; k >= 0; k--) {
				var shield = shields[k];
				if (shield.active && bullet.intersects(shield)) {
					// Shield hit by player bullet
					shield.damage();
					// Deactivate bullet
					bullet.active = false;
					bullet.visible = false;
					activePlayerBullets--;
					// Remove shield if destroyed
					if (!shield.active) {
						game.removeChild(shield);
						shields.splice(k, 1);
					}
					break;
				}
			}
		}
	}
	// Enemy bullets vs player and shields
	for (var i = 0; i < allEnemyBullets.length; i++) {
		var bullet = allEnemyBullets[i];
		if (!bullet.active) continue;
		// Check player collision
		if (bullet.intersects(player) && gameState === "playing") {
			// Player hit
			lives--;
			livesTxt.setText("Lives: " + lives);
			// Deactivate bullet
			bullet.active = false;
			bullet.visible = false;
			activeEnemyBullets--;
			// Play hit sound
			LK.getSound('playerHit').play();
			// Flash player effect
			LK.effects.flashObject(player, 0xff0000, 500);
			if (lives <= 0) {
				gameState = "gameover";
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
			}
			continue;
		}
		// Check shield collision
		if (bullet.active) {
			for (var k = shields.length - 1; k >= 0; k--) {
				var shield = shields[k];
				if (shield.active && bullet.intersects(shield)) {
					// Shield hit by enemy bullet
					shield.damage();
					// Deactivate bullet
					bullet.active = false;
					bullet.visible = false;
					activeEnemyBullets--;
					if (!shield.active) {
						game.removeChild(shield);
						shields.splice(k, 1);
					}
					break;
				}
			}
		}
	}
	// Enemies vs bottom of screen
	// Only check this less frequently (every 10 frames)
	if (LK.ticks % 10 === 0) {
		for (var i = 0; i < enemies.length; i++) {
			if (enemies[i].y + enemies[i].height / 2 > player.y) {
				// Enemies reached player level - game over
				gameState = "gameover";
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				break;
			}
		}
	}
}
// Start next wave
function startNextWave() {
	wave++;
	waveTxt.setText("Wave: " + wave);
	// Increase enemy speed with each wave
	enemiesSpeed += WAVE_SPEED_INCREASE;
	// Adjust powerup drop chance based on wave difficulty
	powerUpManager.dropChance = Math.min(0.35, 0.2 + wave * 0.03); // Increase drop chance slightly with waves
	// Reset all enemy bullets without removing them
	var allEnemyBullets = enemyBulletPool.getAll();
	for (var i = 0; i < allEnemyBullets.length; i++) {
		if (allEnemyBullets[i].active) {
			allEnemyBullets[i].active = false;
			allEnemyBullets[i].visible = false;
		}
	}
	activeEnemyBullets = 0;
	// Create new enemy formation
	createEnemies();
}
// With object pooling, we no longer need to clean up inactive objects
// Main game update loop
game.update = function () {
	// Calculate frame time for consistent speed regardless of framerate
	var currentTime = Date.now();
	frameTime = currentTime - lastFrameTime;
	lastFrameTime = currentTime;
	if (gameState === "playing") {
		// Update player
		player.update();
		// Auto shoot - less frequent check
		if (LK.ticks % 30 === 0) {
			shootPlayerBullet();
		}
		// Move enemies
		enemyMoveTimer++;
		if (enemyMoveTimer >= enemyMoveInterval) {
			moveEnemies();
			enemyMoveTimer = 0;
		}
		// Enemy shooting - only check every 10 frames
		if (enemies.length > 0 && LK.ticks % 10 === 0) {
			// Pre-calculate bottom enemies once per update
			var bottomEnemies = [];
			var columnsWithEnemies = {};
			// Find bottom enemies in each column more efficiently
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var column = enemy.col;
				if (!columnsWithEnemies[column] || enemies[columnsWithEnemies[column]].row < enemy.row) {
					columnsWithEnemies[column] = i;
				}
			}
			// Get bottom enemies
			for (var col in columnsWithEnemies) {
				bottomEnemies.push(enemies[columnsWithEnemies[col]]);
			}
			// Random chance for enemies to shoot
			if (bottomEnemies.length > 0) {
				// Limit number of shots per frame
				var maxShots = Math.min(3, bottomEnemies.length);
				var shotCount = 0;
				for (var i = 0; i < bottomEnemies.length && shotCount < maxShots; i++) {
					if (Math.random() < bottomEnemies[i].shotChance * 2) {
						// Adjusted for less frequent checks
						shootEnemyBullet(bottomEnemies[i]);
						shotCount++;
					}
				}
			}
		}
		// Update bullets from pools
		var allPlayerBullets = playerBulletPool.getAll();
		var allEnemyBullets = enemyBulletPool.getAll();
		// Only update active bullets
		for (var i = 0; i < allPlayerBullets.length; i++) {
			if (allPlayerBullets[i].active) {
				allPlayerBullets[i].update();
			}
		}
		for (var i = 0; i < allEnemyBullets.length; i++) {
			if (allEnemyBullets[i].active) {
				allEnemyBullets[i].update();
			}
		}
		// Update powerups and check for collisions
		powerUpManager.update();
		powerUpManager.checkCollisions(player);
		// Check collisions with optimized method
		checkCollisions();
		// Check if wave cleared
		if (enemies.length === 0) {
			startNextWave();
		}
	}
};
var PowerUpManager = function PowerUpManager() {
	var powerups = [];
	var self = this;
	var maxPowerups = 10;
	// Probability settings
	self.dropChance = 0.2; // 20% chance an enemy drops a powerup
	// Create initial pool of powerups
	for (var i = 0; i < maxPowerups; i++) {
		var powerup = new PowerUp();
		powerup.visible = false;
		powerup.active = false;
		powerups.push(powerup);
		game.addChild(powerup);
	}
	// Get an inactive powerup from the pool
	self.getPowerUp = function () {
		for (var i = 0; i < powerups.length; i++) {
			if (!powerups[i].active) {
				return powerups[i];
			}
		}
		return null; // No powerups available
	};
	// Create a powerup at the given position with random type
	self.createPowerUp = function (x, y) {
		if (Math.random() > self.dropChance) return; // Random chance to drop
		var powerup = self.getPowerUp();
		if (!powerup) return;
		// Determine powerup type randomly
		var rand = Math.random();
		var type;
		if (rand < 0.3) {
			type = "extraLife";
		} else if (rand < 0.7) {
			type = "weaponUpgrade";
		} else {
			type = "shield";
		}
		powerup.init(type, x, y);
	};
	// Update all active powerups
	self.update = function () {
		for (var i = 0; i < powerups.length; i++) {
			if (powerups[i].active) {
				powerups[i].update();
			}
		}
	};
	// Check for collisions with player
	self.checkCollisions = function (player) {
		for (var i = 0; i < powerups.length; i++) {
			var powerup = powerups[i];
			if (powerup.active && player.alive && powerup.intersects(player)) {
				// Apply powerup effect
				self.applyPowerUp(powerup.type);
				// Deactivate powerup
				powerup.active = false;
				powerup.visible = false;
				// Visual feedback
				LK.effects.flashObject(player, 0x00ff00, 300);
			}
		}
	};
	// Apply powerup effects
	self.applyPowerUp = function (type) {
		if (type === "extraLife") {
			// Add extra life
			lives++;
			livesTxt.setText("Lives: " + lives);
		} else if (type === "weaponUpgrade") {
			// Temporary weapon upgrade (faster fire rate)
			var originalFireRate = player.fireRate;
			player.fireRate = Math.max(5, player.fireRate - 5); // Reduce fire rate (faster shots)
			// Reset after 10 seconds
			LK.setTimeout(function () {
				player.fireRate = originalFireRate;
			}, 10000);
		} else if (type === "shield") {
			// Create new shield for player
			var shield = new Shield();
			shield.x = player.x;
			shield.y = SHIELD_Y;
			shield.active = true;
			shields.push(shield);
			game.addChild(shield);
		}
	};
	// Get all powerups
	self.getAll = function () {
		return powerups;
	};
};

===================================================================
--- original.js
+++ change.js
@@ -113,8 +113,84 @@
 		}
 	};
 	return self;
 });
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	// Default values
+	self.type = "none";
+	self.speed = 3;
+	self.active = false;
+	self.visible = false;
+	self.width = 80;
+	self.height = 80;
+	// Create base graphics container that will hold the powerup visual
+	var graphics = new Container();
+	self.addChild(graphics);
+	// Initialize with specific type
+	self.init = function (type, x, y) {
+		self.type = type;
+		self.x = x;
+		self.y = y;
+		self.active = true;
+		self.visible = true;
+		// Clear previous graphics
+		while (graphics.children.length > 0) {
+			graphics.removeChild(graphics.children[0]);
+		}
+		// Create visuals based on type
+		if (type === "extraLife") {
+			var heart = LK.getAsset('shield', {
+				anchorX: 0.5,
+				anchorY: 0.5,
+				tint: 0xff0000 // Red heart
+			});
+			graphics.addChild(heart);
+		} else if (type === "weaponUpgrade") {
+			var weapon = LK.getAsset('playerBullet', {
+				anchorX: 0.5,
+				anchorY: 0.5,
+				tint: 0xffff00 // Yellow weapon upgrade
+			});
+			graphics.addChild(weapon);
+		} else if (type === "shield") {
+			var shield = LK.getAsset('shield', {
+				anchorX: 0.5,
+				anchorY: 0.5,
+				tint: 0x00ffff // Cyan shield
+			});
+			graphics.addChild(shield);
+		}
+		// Apply a pulsing effect to make powerups stand out
+		self.pulseEffect();
+	};
+	// Pulsing animation effect
+	self.pulseEffect = function () {
+		tween.to(graphics, 0.5, {
+			scaleX: 1.2,
+			scaleY: 1.2,
+			onComplete: function onComplete() {
+				tween.to(graphics, 0.5, {
+					scaleX: 1.0,
+					scaleY: 1.0,
+					onComplete: self.pulseEffect
+				});
+			}
+		});
+	};
+	// Update powerup position - move downward
+	self.update = function () {
+		if (self.active) {
+			self.y += self.speed;
+			// Deactivate when off screen
+			if (self.y > GAME_HEIGHT + self.height) {
+				self.active = false;
+				self.visible = false;
+			}
+		}
+	};
+	return self;
+});
 var Shield = Container.expand(function () {
 	var self = Container.call(this);
 	var shieldGraphics = self.attachAsset('shield', {
 		anchorX: 0.5,
@@ -182,8 +258,9 @@
 // Game state
 var player;
 var playerBulletPool;
 var enemyBulletPool;
+var powerUpManager;
 var activePlayerBullets = 0;
 var activeEnemyBullets = 0;
 var enemies = [];
 var shields = [];
@@ -210,8 +287,10 @@
 game.addChild(player);
 // Initialize bullet pools
 playerBulletPool = new BulletPool(PlayerBullet, 20);
 enemyBulletPool = new BulletPool(EnemyBullet, 50);
+// Initialize power-up manager
+powerUpManager = new PowerUpManager();
 // Add all bullets to the game
 var allPlayerBullets = playerBulletPool.getAll();
 var allEnemyBullets = enemyBulletPool.getAll();
 for (var i = 0; i < allPlayerBullets.length; i++) {
@@ -375,11 +454,16 @@
 			if (bullet.intersects(enemy)) {
 				// Enemy hit
 				score += enemy.points;
 				scoreTxt.setText("Score: " + score);
+				// Create a powerup with a certain chance
+				var enemyX = enemy.x;
+				var enemyY = enemy.y;
 				// Remove enemy
 				game.removeChild(enemy);
 				enemies.splice(j, 1);
+				// Try to spawn a power-up at enemy position
+				powerUpManager.createPowerUp(enemyX, enemyY);
 				// Deactivate bullet
 				bullet.active = false;
 				bullet.visible = false;
 				activePlayerBullets--;
@@ -475,8 +559,10 @@
 	wave++;
 	waveTxt.setText("Wave: " + wave);
 	// Increase enemy speed with each wave
 	enemiesSpeed += WAVE_SPEED_INCREASE;
+	// Adjust powerup drop chance based on wave difficulty
+	powerUpManager.dropChance = Math.min(0.35, 0.2 + wave * 0.03); // Increase drop chance slightly with waves
 	// Reset all enemy bullets without removing them
 	var allEnemyBullets = enemyBulletPool.getAll();
 	for (var i = 0; i < allEnemyBullets.length; i++) {
 		if (allEnemyBullets[i].active) {
@@ -552,12 +638,107 @@
 			if (allEnemyBullets[i].active) {
 				allEnemyBullets[i].update();
 			}
 		}
+		// Update powerups and check for collisions
+		powerUpManager.update();
+		powerUpManager.checkCollisions(player);
 		// Check collisions with optimized method
 		checkCollisions();
 		// Check if wave cleared
 		if (enemies.length === 0) {
 			startNextWave();
 		}
 	}
+};
+var PowerUpManager = function PowerUpManager() {
+	var powerups = [];
+	var self = this;
+	var maxPowerups = 10;
+	// Probability settings
+	self.dropChance = 0.2; // 20% chance an enemy drops a powerup
+	// Create initial pool of powerups
+	for (var i = 0; i < maxPowerups; i++) {
+		var powerup = new PowerUp();
+		powerup.visible = false;
+		powerup.active = false;
+		powerups.push(powerup);
+		game.addChild(powerup);
+	}
+	// Get an inactive powerup from the pool
+	self.getPowerUp = function () {
+		for (var i = 0; i < powerups.length; i++) {
+			if (!powerups[i].active) {
+				return powerups[i];
+			}
+		}
+		return null; // No powerups available
+	};
+	// Create a powerup at the given position with random type
+	self.createPowerUp = function (x, y) {
+		if (Math.random() > self.dropChance) return; // Random chance to drop
+		var powerup = self.getPowerUp();
+		if (!powerup) return;
+		// Determine powerup type randomly
+		var rand = Math.random();
+		var type;
+		if (rand < 0.3) {
+			type = "extraLife";
+		} else if (rand < 0.7) {
+			type = "weaponUpgrade";
+		} else {
+			type = "shield";
+		}
+		powerup.init(type, x, y);
+	};
+	// Update all active powerups
+	self.update = function () {
+		for (var i = 0; i < powerups.length; i++) {
+			if (powerups[i].active) {
+				powerups[i].update();
+			}
+		}
+	};
+	// Check for collisions with player
+	self.checkCollisions = function (player) {
+		for (var i = 0; i < powerups.length; i++) {
+			var powerup = powerups[i];
+			if (powerup.active && player.alive && powerup.intersects(player)) {
+				// Apply powerup effect
+				self.applyPowerUp(powerup.type);
+				// Deactivate powerup
+				powerup.active = false;
+				powerup.visible = false;
+				// Visual feedback
+				LK.effects.flashObject(player, 0x00ff00, 300);
+			}
+		}
+	};
+	// Apply powerup effects
+	self.applyPowerUp = function (type) {
+		if (type === "extraLife") {
+			// Add extra life
+			lives++;
+			livesTxt.setText("Lives: " + lives);
+		} else if (type === "weaponUpgrade") {
+			// Temporary weapon upgrade (faster fire rate)
+			var originalFireRate = player.fireRate;
+			player.fireRate = Math.max(5, player.fireRate - 5); // Reduce fire rate (faster shots)
+			// Reset after 10 seconds
+			LK.setTimeout(function () {
+				player.fireRate = originalFireRate;
+			}, 10000);
+		} else if (type === "shield") {
+			// Create new shield for player
+			var shield = new Shield();
+			shield.x = player.x;
+			shield.y = SHIELD_Y;
+			shield.active = true;
+			shields.push(shield);
+			game.addChild(shield);
+		}
+	};
+	// Get all powerups
+	self.getAll = function () {
+		return powerups;
+	};
 };
\ No newline at end of file