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

/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGfx = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = bulletGfx.width / 2;
	self.speed = 32; // Fast bullet
	self.vx = 0;
	self.vy = 0;
	// Set direction
	self.setDirection = function (dx, dy) {
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0) {
			self.vx = dx / len * self.speed;
			self.vy = dy / len * self.speed;
		}
	};
	self.update = function () {
		// Move bullet
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGfx = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add a gun to hero's hand
	// Use the new blue gun asset, positioned to the right hand
	var gunGfx = self.attachAsset('bluegun', {
		anchorX: 0.2,
		anchorY: 0.5,
		scaleX: 1.2,
		scaleY: 0.6,
		x: heroGfx.width * 0.38,
		// offset to right hand
		y: 0
	});
	// Track gun rotation
	self.gunGfx = gunGfx;
	self.gunAngle = 0;
	// For future upgrades: health, weapon, etc.
	self.radius = heroGfx.width / 2;
	return self;
});
// Zombie class
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGfx = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = zombieGfx.width / 2;
	// Speed will be set on spawn
	// Make zombies move at half the speed of the hero
	var heroBaseSpeed = 6; // Set hero base speed (if not defined elsewhere)
	self.speed = heroBaseSpeed * 0.5 + Math.random() * (heroBaseSpeed * 0.1); // 50% slower, small random
	// Direction vector
	self.vx = 0;
	self.vy = 0;
	// Health for zombie: 1 heart
	self.maxHealth = 1;
	self.health = self.maxHealth;
	// Heart icon(s) above zombie
	self.heartIcons = [];
	for (var i = 0; i < self.maxHealth; i++) {
		var heartIcon = LK.getAsset('heart', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: (i - (self.maxHealth - 1) / 2) * 60,
			// center hearts
			y: -self.radius - 40,
			scaleX: 0.7,
			scaleY: 0.7
		});
		self.addChild(heartIcon);
		self.heartIcons.push(heartIcon);
	}
	// Set direction towards hero
	self.setDirection = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0) {
			self.vx = dx / len * self.speed;
			self.vy = dy / len * self.speed;
		}
	};
	// Move towards direction
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		// Keep health text above zombie
		if (self.healthTxt) {
			self.healthTxt.x = 0;
			self.healthTxt.y = -self.radius - 10;
		}
	};
	// Method to take damage
	self.takeDamage = function (amount) {
		self.health -= amount;
		if (self.health < 0) self.health = 0;
		// Update heart icons
		for (var i = 0; i < self.heartIcons.length; i++) {
			self.heartIcons[i].visible = i < self.health;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181818
});

/**** 
* Game Code
****/ 
// Sound for shooting
// Bullet asset: yellow box
// Zombie asset: green ellipse
// Hero asset: red box
// Game area
// New blue gun asset
var GAME_W = 2048;
var GAME_H = 2732;
// Hero base speed for zombie speed calculation
var heroBaseSpeed = 6;
// Hero setup
var hero = new Hero();
hero.x = GAME_W / 2;
hero.y = GAME_H / 2;
game.addChild(hero);
// Bullets and zombies arrays
var bullets = [];
var zombies = [];
// --- Şarjör/Magazine System ---
var MAG_SIZE = 7; // şarjör kapasitesi
var TOTAL_BULLETS = 20; // toplam yedek mermi
var magazine = MAG_SIZE; // şarjördeki mermi
var reserveBullets = TOTAL_BULLETS - MAG_SIZE; // yedek mermi
var isReloading = false;
var reloadTime = 3000; // ms
var reloadTimeout = null;
// --- Bullet Type System (auto change every 2 seconds) ---
var bulletTypes = [{
	id: 'bullet',
	speed: 32
},
// default
{
	id: 'bullet',
	speed: 48
},
// fast
{
	id: 'bullet',
	speed: 16
} // slow
];
var currentBulletTypeIndex = 0;
var bulletTypeChangeInterval = null;
// Start auto bullet type change
function startBulletTypeAutoChange() {
	if (bulletTypeChangeInterval) LK.clearInterval(bulletTypeChangeInterval);
	bulletTypeChangeInterval = LK.setInterval(function () {
		currentBulletTypeIndex = (currentBulletTypeIndex + 1) % bulletTypes.length;
	}, 2000);
}
startBulletTypeAutoChange();
// Mermi UI - Text-based bullet count at the bottom left
var bulletTxt = new Text2(magazine + " / " + reserveBullets, {
	size: 90,
	fill: "#fff"
});
// Anchor to left-bottom
bulletTxt.anchor.set(0, 1);
bulletTxt.x = 60;
bulletTxt.y = 2732 - 40;
LK.gui.bottomLeft.addChild(bulletTxt);
function updateBulletIcons() {
	bulletTxt.setText(magazine + " / " + reserveBullets);
	if (typeof outOfAmmoTxt !== "undefined" && outOfAmmoTxt && outOfAmmoTxt.visible) {
		outOfAmmoTxt.setText("Mermi bitti\n" + magazine + " / " + reserveBullets);
	}
}
updateBulletIcons();
// "Mermi bitti" UI
var outOfAmmoTxt = new Text2("Mermi bitti\n" + magazine + " / " + reserveBullets, {
	size: 260,
	fill: "#fff",
	align: "center"
});
// Bottom center: anchor to center-bottom, x=center, y=height
outOfAmmoTxt.anchor.set(0.5, 1);
outOfAmmoTxt.x = 2048 / 2;
outOfAmmoTxt.y = 2732 - 40;
outOfAmmoTxt.visible = false;
LK.gui.bottom.addChild(outOfAmmoTxt);
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Hearts (health)
var maxHearts = 5;
var hearts = [];
for (var i = 0; i < maxHearts; i++) {
	var heart = LK.getAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 160 + i * 120,
		y: 80,
		scaleX: 1.1,
		scaleY: 1.1
	});
	LK.gui.top.addChild(heart);
	hearts.push(heart);
}
var currentHearts = maxHearts;
// Dragging
var dragNode = null;
// Touch/move controls
function handleMove(x, y, obj) {
	// Drag hero
	if (dragNode === hero) {
		// Clamp hero inside game area, avoid top left 100x100
		var minX = hero.radius + 100;
		var maxX = GAME_W - hero.radius;
		var minY = hero.radius;
		var maxY = GAME_H - hero.radius;
		hero.x = Math.max(minX, Math.min(maxX, x));
		hero.y = Math.max(minY, Math.min(maxY, y));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only drag if touch is on hero
	var dx = x - hero.x;
	var dy = y - hero.y;
	if (dx * dx + dy * dy <= hero.radius * hero.radius) {
		dragNode = hero;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Shooting: tap anywhere not on hero to shoot
game.tap = function (x, y, obj) {
	// Don't shoot if tap is on hero
	var dx = x - hero.x;
	var dy = y - hero.y;
	if (dx * dx + dy * dy <= hero.radius * hero.radius) return;
	// Create bullet
	var bullet = new Bullet();
	bullet.x = hero.x;
	bullet.y = hero.y;
	// Set bullet speed/type
	var bulletType = bulletTypes[currentBulletTypeIndex];
	bullet.speed = bulletType.speed;
	bullet.setDirection(dx, dy);
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('shoot').play();
	// Rotate gun towards shot direction
	if (typeof hero.gunGfx !== "undefined") {
		hero.gunGfx.rotation = Math.atan2(dy, dx);
	}
};
game.down = function (x, y, obj) {
	// Drag or shoot
	var dx = x - hero.x;
	var dy = y - hero.y;
	if (dx * dx + dy * dy <= hero.radius * hero.radius) {
		dragNode = hero;
		handleMove(x, y, obj);
	} else {
		// --- Şarjör/Magazine Logic ---
		if (isReloading) {
			// Reloading, can't shoot
			return;
		}
		if (magazine > 0) {
			// Shoot
			var bullet = new Bullet();
			bullet.x = hero.x;
			bullet.y = hero.y;
			// Set bullet speed/type
			var bulletType = bulletTypes[currentBulletTypeIndex];
			bullet.speed = bulletType.speed;
			bullet.setDirection(dx, dy);
			bullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			// Rotate gun towards shot direction
			if (typeof hero.gunGfx !== "undefined") {
				hero.gunGfx.rotation = Math.atan2(dy, dx);
			}
			magazine--;
			updateBulletIcons();
			outOfAmmoTxt.visible = false;
			// If şarjör bitti, start reload if possible
			if (magazine === 0) {
				if (reserveBullets > 0) {
					isReloading = true;
					LK.getSound('reload').play();
					// Stop reload sound after 1 second to ensure it only plays for 1s
					LK.setTimeout(function () {
						if (LK.getSound('reload').stop) LK.getSound('reload').stop();
					}, 1000);
					outOfAmmoTxt.setText("Mermi bitti\n" + magazine + " / " + reserveBullets);
					outOfAmmoTxt.visible = true;
					reloadTimeout = LK.setTimeout(function () {
						// Calculate how many bullets to reload
						var reloadAmount = Math.min(MAG_SIZE, reserveBullets);
						magazine = reloadAmount;
						reserveBullets -= reloadAmount;
						updateBulletIcons();
						isReloading = false;
						outOfAmmoTxt.visible = false;
					}, reloadTime);
				} else {
					// No reserve, show out of ammo
					outOfAmmoTxt.setText("Mermi bitti\n" + magazine + " / " + reserveBullets);
					outOfAmmoTxt.visible = true;
				}
			}
		} else {
			// No bullets in magazine
			if (!isReloading) {
				// If reserve bullets available, start reload
				if (reserveBullets > 0) {
					isReloading = true;
					LK.getSound('reload').play();
					// Stop reload sound after 1 second to ensure it only plays for 1s
					LK.setTimeout(function () {
						if (LK.getSound('reload').stop) LK.getSound('reload').stop();
					}, 1000);
					outOfAmmoTxt.setText("Mermi bitti\n" + magazine + " / " + reserveBullets);
					outOfAmmoTxt.visible = true;
					reloadTimeout = LK.setTimeout(function () {
						var reloadAmount = Math.min(MAG_SIZE, reserveBullets);
						magazine = reloadAmount;
						reserveBullets -= reloadAmount;
						updateBulletIcons();
						isReloading = false;
						outOfAmmoTxt.visible = false;
					}, reloadTime);
				} else {
					// No reserve, show out of ammo
					outOfAmmoTxt.setText("Mermi bitti\n" + magazine + " / " + reserveBullets);
					outOfAmmoTxt.visible = true;
				}
			}
		}
	}
};
// Zombie spawn timer
var zombieSpawnInterval = 90; // frames
var zombieSpawnTimer = 0;
// Helper: spawn zombie at random edge
function spawnZombie() {
	var zombie = new Zombie();
	// Randomize health: 15% get 3, 30% get 2, rest get 1
	var r = Math.random();
	if (r < 0.15) {
		zombie.maxHealth = 3;
	} else if (r < 0.45) {
		zombie.maxHealth = 2;
	} else {
		zombie.maxHealth = 1;
	}
	zombie.health = zombie.maxHealth;
	// Remove old heart icons if any
	if (zombie.heartIcons && zombie.heartIcons.length > 0) {
		for (var h = 0; h < zombie.heartIcons.length; h++) {
			zombie.heartIcons[h].destroy && zombie.heartIcons[h].destroy();
		}
		zombie.heartIcons = [];
	}
	// Add heart icons for new health
	for (var i = 0; i < zombie.maxHealth; i++) {
		var heartIcon = LK.getAsset('heart', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: (i - (zombie.maxHealth - 1) / 2) * 60,
			y: -zombie.radius - 40,
			scaleX: 0.7,
			scaleY: 0.7
		});
		zombie.addChild(heartIcon);
		zombie.heartIcons.push(heartIcon);
	}
	// Random edge: 0=top,1=bottom,2=left,3=right
	var edge = Math.floor(Math.random() * 4);
	var margin = 80;
	if (edge === 0) {
		// top
		zombie.x = margin + Math.random() * (GAME_W - 2 * margin);
		zombie.y = -zombie.radius;
	} else if (edge === 1) {
		// bottom
		zombie.x = margin + Math.random() * (GAME_W - 2 * margin);
		zombie.y = GAME_H + zombie.radius;
	} else if (edge === 2) {
		// left
		zombie.x = -zombie.radius;
		zombie.y = margin + Math.random() * (GAME_H - 2 * margin);
	} else {
		// right
		zombie.x = GAME_W + zombie.radius;
		zombie.y = margin + Math.random() * (GAME_H - 2 * margin);
	}
	zombie.setDirection(hero.x, hero.y);
	zombies.push(zombie);
	game.addChild(zombie);
}
// Main update loop
game.update = function () {
	// Update zombies
	for (var i = zombies.length - 1; i >= 0; i--) {
		var z = zombies[i];
		// Always update direction towards hero
		z.setDirection(hero.x, hero.y);
		z.update();
		// Check collision with hero
		var dx = z.x - hero.x;
		var dy = z.y - hero.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < z.radius + hero.radius - 10) {
			// Lose a heart
			if (currentHearts > 0) {
				currentHearts--;
				// Hide a heart visually
				if (hearts[currentHearts]) {
					hearts[currentHearts].visible = false;
				}
				LK.effects.flashObject(hero, 0xff0000, 400);
				// Move zombie that hit away from hero instead of destroying
				// Calculate vector from hero to zombie
				var awayDx = z.x - hero.x;
				var awayDy = z.y - hero.y;
				var awayLen = Math.sqrt(awayDx * awayDx + awayDy * awayDy);
				// Move zombie 400px away from hero, but clamp inside game area
				if (awayLen > 0) {
					var moveDist = 400;
					var newX = hero.x + awayDx / awayLen * moveDist;
					var newY = hero.y + awayDy / awayLen * moveDist;
					// Clamp to game area (with margin for zombie size)
					var margin = z.radius + 20;
					newX = Math.max(margin, Math.min(GAME_W - margin, newX));
					newY = Math.max(margin, Math.min(GAME_H - margin, newY));
					z.x = newX;
					z.y = newY;
				}
				// If no hearts left, game over
				if (currentHearts === 0) {
					LK.effects.flashScreen(0xff0000, 1000);
					LK.showGameOver();
					return;
				}
			}
		}
	}
	// Update bullets and check collision with zombies
	for (var j = bullets.length - 1; j >= 0; j--) {
		var b = bullets[j];
		b.update && b.update();
		// Remove bullet if out of bounds
		if (b.x < -b.radius || b.x > GAME_W + b.radius || b.y < -b.radius || b.y > GAME_H + b.radius) {
			b.destroy();
			bullets.splice(j, 1);
			continue;
		}
		// Check collision with zombies
		for (var k = zombies.length - 1; k >= 0; k--) {
			var z2 = zombies[k];
			var dx2 = b.x - z2.x;
			var dy2 = b.y - z2.y;
			var dist2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
			if (dist2 < b.radius + z2.radius - 10) {
				// Zombie takes damage
				if (typeof z2.takeDamage === "function") {
					z2.takeDamage(1);
					// If health reaches zero, destroy
					if (z2.health <= 0) {
						// 5% chance to drop a heart
						if (Math.random() < 0.05) {
							var heartDrop = new Container();
							var heartGfx = heartDrop.attachAsset('heart', {
								anchorX: 0.5,
								anchorY: 0.5,
								scaleX: 1.2,
								scaleY: 1.2
							});
							heartDrop.x = z2.x;
							heartDrop.y = z2.y;
							heartDrop.radius = heartGfx.width * 0.6;
							heartDrop.update = function () {
								// Animate heart (optional: float up and down)
								if (typeof this.floatDir === "undefined") this.floatDir = 1;
								if (typeof this.floatOffset === "undefined") this.floatOffset = 0;
								this.floatOffset += this.floatDir * 1.2;
								if (this.floatOffset > 18) this.floatDir = -1;
								if (this.floatOffset < -18) this.floatDir = 1;
								this.y += this.floatDir * 0.7;
								// Check collision with hero
								var dxh = this.x - hero.x;
								var dyh = this.y - hero.y;
								var distH = Math.sqrt(dxh * dxh + dyh * dyh);
								if (distH < hero.radius + this.radius - 10) {
									// Collect heart: refill all hearts
									for (var h = 0; h < hearts.length; h++) {
										hearts[h].visible = true;
									}
									currentHearts = maxHearts;
									this.destroy();
									// Remove from heartDrops array
									for (var hd = 0; hd < heartDrops.length; hd++) {
										if (heartDrops[hd] === this) {
											heartDrops.splice(hd, 1);
											break;
										}
									}
								}
							};
							if (typeof heartDrops === "undefined") heartDrops = [];
							heartDrops.push(heartDrop);
							game.addChild(heartDrop);
						}
						// 10% chance to drop a bullet pack
						if (Math.random() < 0.10) {
							// Determine bullet amount: random between 5 and 50, but not less than 5, not more than 50
							var minBullets = 5;
							var maxBullets = 50;
							// The initial TOTAL_BULLETS is 20, but drop can be more or less
							var bulletAmount = Math.floor(Math.random() * (maxBullets - minBullets + 1)) + minBullets;
							// Create bullet drop container
							var bulletDrop = new Container();
							var bulletGfx = bulletDrop.attachAsset('bullet', {
								anchorX: 0.5,
								anchorY: 0.5,
								scaleX: 1.5 + (bulletAmount - 5) / 45,
								// scale from 1.5 (5 bullets) up to ~2.5 (50 bullets)
								scaleY: 1.5 + (bulletAmount - 5) / 45
							});
							bulletDrop.x = z2.x;
							bulletDrop.y = z2.y;
							bulletDrop.radius = bulletGfx.width * 0.7 * bulletGfx.scaleX; // slightly larger for easier pickup
							// Show bullet amount above the bullet
							var bulletAmtTxt = new Text2(bulletAmount + "", {
								size: 70,
								fill: 0xFFE600,
								align: "center"
							});
							bulletAmtTxt.anchor.set(0.5, 1);
							bulletAmtTxt.x = 0;
							bulletAmtTxt.y = -bulletGfx.height * bulletGfx.scaleY / 2 - 10;
							bulletDrop.addChild(bulletAmtTxt);
							bulletDrop.update = function () {
								// Animate bullet (optional: float up and down)
								if (typeof this.floatDir === "undefined") this.floatDir = 1;
								if (typeof this.floatOffset === "undefined") this.floatOffset = 0;
								this.floatOffset += this.floatDir * 1.2;
								if (this.floatOffset > 18) this.floatDir = -1;
								if (this.floatOffset < -18) this.floatDir = 1;
								this.y += this.floatDir * 0.7;
								// Check collision with hero
								var dxh = this.x - hero.x;
								var dyh = this.y - hero.y;
								var distH = Math.sqrt(dxh * dxh + dyh * dyh);
								if (distH < hero.radius + this.radius - 10) {
									// Collect bullet: add to reserveBullets, but never above 999
									reserveBullets += bulletAmount;
									if (reserveBullets > 999) reserveBullets = 999;
									updateBulletIcons();
									this.destroy();
									// Remove from bulletDrops array
									for (var bd = 0; bd < bulletDrops.length; bd++) {
										if (bulletDrops[bd] === this) {
											bulletDrops.splice(bd, 1);
											break;
										}
									}
								}
							};
							if (typeof bulletDrops === "undefined") bulletDrops = [];
							bulletDrops.push(bulletDrop);
							game.addChild(bulletDrop);
						}
						z2.destroy();
						zombies.splice(k, 1);
						// Score up
						score += 1;
						scoreTxt.setText(score);
					}
				} else {
					// fallback: destroy if no health system
					z2.destroy();
					zombies.splice(k, 1);
					score += 1;
					scoreTxt.setText(score);
				}
				b.destroy();
				bullets.splice(j, 1);
				break;
			}
		}
	}
	// Animate and check collision for heart drops
	if (typeof heartDrops !== "undefined" && heartDrops.length > 0) {
		for (var hd = heartDrops.length - 1; hd >= 0; hd--) {
			var hdrop = heartDrops[hd];
			if (hdrop && typeof hdrop.update === "function") hdrop.update();
		}
	}
	// Animate and check collision for bullet drops
	if (typeof bulletDrops !== "undefined" && bulletDrops.length > 0) {
		for (var bd = bulletDrops.length - 1; bd >= 0; bd--) {
			var bdrop = bulletDrops[bd];
			if (bdrop && typeof bdrop.update === "function") bdrop.update();
		}
	}
	// Spawn zombies
	zombieSpawnTimer++;
	if (zombieSpawnTimer >= zombieSpawnInterval) {
		// Spawn more zombies as time goes on
		// Calculate how many zombies to spawn: start at 1, increase by 1 every 10 kills, max 6
		var zombiesToSpawn = 1 + Math.floor(score / 10);
		if (zombiesToSpawn > 6) zombiesToSpawn = 6;
		for (var s = 0; s < zombiesToSpawn; s++) {
			spawnZombie();
		}
		zombieSpawnTimer = 0;
		// Gradually increase spawn rate (lower interval)
		if (zombieSpawnInterval > 30) zombieSpawnInterval -= 1;
	}
	// No random bullet spawn at corners
};
// Center hero on start
hero.x = GAME_W / 2;
hero.y = GAME_H / 2;
// Reset şarjör and reserve on game start
magazine = MAG_SIZE;
reserveBullets = TOTAL_BULLETS - MAG_SIZE;
isReloading = false;
if (reloadTimeout) {
	LK.clearTimeout(reloadTimeout);
	reloadTimeout = null;
}
updateBulletIcons();
outOfAmmoTxt.visible = false;
// Initial zombie spawn
for (var i = 0; i < 3; i++) {
	spawnZombie();
}

===================================================================
--- original.js
+++ change.js
@@ -547,8 +547,68 @@
 							if (typeof heartDrops === "undefined") heartDrops = [];
 							heartDrops.push(heartDrop);
 							game.addChild(heartDrop);
 						}
+						// 10% chance to drop a bullet pack
+						if (Math.random() < 0.10) {
+							// Determine bullet amount: random between 5 and 50, but not less than 5, not more than 50
+							var minBullets = 5;
+							var maxBullets = 50;
+							// The initial TOTAL_BULLETS is 20, but drop can be more or less
+							var bulletAmount = Math.floor(Math.random() * (maxBullets - minBullets + 1)) + minBullets;
+							// Create bullet drop container
+							var bulletDrop = new Container();
+							var bulletGfx = bulletDrop.attachAsset('bullet', {
+								anchorX: 0.5,
+								anchorY: 0.5,
+								scaleX: 1.5 + (bulletAmount - 5) / 45,
+								// scale from 1.5 (5 bullets) up to ~2.5 (50 bullets)
+								scaleY: 1.5 + (bulletAmount - 5) / 45
+							});
+							bulletDrop.x = z2.x;
+							bulletDrop.y = z2.y;
+							bulletDrop.radius = bulletGfx.width * 0.7 * bulletGfx.scaleX; // slightly larger for easier pickup
+							// Show bullet amount above the bullet
+							var bulletAmtTxt = new Text2(bulletAmount + "", {
+								size: 70,
+								fill: 0xFFE600,
+								align: "center"
+							});
+							bulletAmtTxt.anchor.set(0.5, 1);
+							bulletAmtTxt.x = 0;
+							bulletAmtTxt.y = -bulletGfx.height * bulletGfx.scaleY / 2 - 10;
+							bulletDrop.addChild(bulletAmtTxt);
+							bulletDrop.update = function () {
+								// Animate bullet (optional: float up and down)
+								if (typeof this.floatDir === "undefined") this.floatDir = 1;
+								if (typeof this.floatOffset === "undefined") this.floatOffset = 0;
+								this.floatOffset += this.floatDir * 1.2;
+								if (this.floatOffset > 18) this.floatDir = -1;
+								if (this.floatOffset < -18) this.floatDir = 1;
+								this.y += this.floatDir * 0.7;
+								// Check collision with hero
+								var dxh = this.x - hero.x;
+								var dyh = this.y - hero.y;
+								var distH = Math.sqrt(dxh * dxh + dyh * dyh);
+								if (distH < hero.radius + this.radius - 10) {
+									// Collect bullet: add to reserveBullets, but never above 999
+									reserveBullets += bulletAmount;
+									if (reserveBullets > 999) reserveBullets = 999;
+									updateBulletIcons();
+									this.destroy();
+									// Remove from bulletDrops array
+									for (var bd = 0; bd < bulletDrops.length; bd++) {
+										if (bulletDrops[bd] === this) {
+											bulletDrops.splice(bd, 1);
+											break;
+										}
+									}
+								}
+							};
+							if (typeof bulletDrops === "undefined") bulletDrops = [];
+							bulletDrops.push(bulletDrop);
+							game.addChild(bulletDrop);
+						}
 						z2.destroy();
 						zombies.splice(k, 1);
 						// Score up
 						score += 1;
@@ -573,8 +633,15 @@
 			var hdrop = heartDrops[hd];
 			if (hdrop && typeof hdrop.update === "function") hdrop.update();
 		}
 	}
+	// Animate and check collision for bullet drops
+	if (typeof bulletDrops !== "undefined" && bulletDrops.length > 0) {
+		for (var bd = bulletDrops.length - 1; bd >= 0; bd--) {
+			var bdrop = bulletDrops[bd];
+			if (bdrop && typeof bdrop.update === "function") bdrop.update();
+		}
+	}
 	// Spawn zombies
 	zombieSpawnTimer++;
 	if (zombieSpawnTimer >= zombieSpawnInterval) {
 		// Spawn more zombies as time goes on