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

/**** 
* Classes
****/ 
var Base = Container.expand(function () {
	var self = Container.call(this);
	var baseGraphics = self.attachAsset('base', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 100;
	self.maxHealth = 100;
	self.takeDamage = function (damage) {
		self.health -= damage;
		tween(baseGraphics, {
			tint: 0xff0000
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(baseGraphics, {
					tint: 0xffffff
				}, {
					duration: 100
				});
			}
		});
		if (self.health <= 0) {
			LK.showGameOver();
		}
	};
	self.down = function (x, y, obj) {
		if (!upgradePanel.visible) {
			upgradePanel.visible = true;
		} else {
			upgradePanel.visible = false;
		}
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 15;
	self.damage = 1;
	self.dx = 0;
	self.dy = 0;
	self.setDirection = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.dx = dx / distance * self.speed;
			self.dy = dy / distance * self.speed;
			self.rotation = Math.atan2(dy, dx);
		}
	};
	self.update = function () {
		self.x += self.dx;
		self.y += self.dy;
	};
	return self;
});
var Character = Container.expand(function () {
	var self = Container.call(this);
	var characterGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.fireRate = 40;
	self.fireCooldown = 0;
	self.update = function () {
		if (self.fireCooldown > 0) {
			self.fireCooldown--;
		}
		// Find closest zombie for automatic shooting
		if (self.fireCooldown === 0 && zombies.length > 0) {
			var closestZombie = null;
			var closestDistance = Infinity;
			for (var i = 0; i < zombies.length; i++) {
				var zombie = zombies[i];
				var dx = zombie.x - self.x;
				var dy = zombie.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestZombie = zombie;
				}
			}
			if (closestZombie) {
				self.shoot(closestZombie.x, closestZombie.y);
			}
		}
	};
	self.shoot = function (targetX, targetY) {
		if (self.fireCooldown > 0) return;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.setDirection(targetX, targetY);
		bullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
		self.fireCooldown = self.fireRate;
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.value = 10;
	self.lifetime = 300;
	self.update = function () {
		self.lifetime--;
		coinGraphics.alpha = Math.min(1, self.lifetime / 100);
	};
	return self;
});
var Drone = Container.expand(function () {
	var self = Container.call(this);
	var vacuumField = self.attachAsset('vacuumField', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.1,
		scaleX: 0.445,
		scaleY: 0.445
	});
	var droneGraphics = self.attachAsset('drone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.target = null;
	self.collectRange = 22; // Reduced from 50 to achieve 80% area reduction
	self.vacuumRange = 89; // Reduced from 200 to achieve 80% area reduction
	self.vacuumPower = 0.15; // Strength of vacuum pull
	self.floatOffset = 0;
	self.floatSpeed = 0.05;
	self.vx = 0;
	self.vy = 0;
	self.update = function () {
		// Floating animation
		self.floatOffset += self.floatSpeed;
		droneGraphics.y = Math.sin(self.floatOffset) * 10;
		// Vacuum field pulsing animation
		vacuumField.scaleX = 0.445 + Math.sin(self.floatOffset * 2) * 0.045;
		vacuumField.scaleY = 0.445 + Math.sin(self.floatOffset * 2) * 0.045;
		vacuumField.alpha = 0.05 + Math.sin(self.floatOffset * 3) * 0.03;
		// Find closest coin
		var closestCoin = null;
		var closestDistance = Infinity;
		for (var i = 0; i < coins.length; i++) {
			var coin = coins[i];
			var dx = coin.x - self.x;
			var dy = coin.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestCoin = coin;
			}
		}
		self.target = closestCoin;
		// Calculate desired velocity towards target
		var desiredVx = 0;
		var desiredVy = 0;
		if (self.target) {
			var dx = self.target.x - self.x;
			var dy = self.target.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > self.collectRange) {
				desiredVx = dx / distance * self.speed;
				desiredVy = dy / distance * self.speed;
			}
		} else {
			// Return to base when no coins
			var dx = base.x - self.x;
			var dy = base.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 150) {
				desiredVx = dx / distance * self.speed;
				desiredVy = dy / distance * self.speed;
			}
		}
		// Smoothly interpolate current velocity towards desired velocity
		self.vx = self.vx * 0.85 + desiredVx * 0.15;
		self.vy = self.vy * 0.85 + desiredVy * 0.15;
		// Apply smoothed velocity
		self.x += self.vx;
		self.y += self.vy;
		// Apply vacuum effect to nearby coins
		for (var i = 0; i < coins.length; i++) {
			var coin = coins[i];
			var dx = self.x - coin.x;
			var dy = self.y - coin.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < self.vacuumRange && distance > 0) {
				// Pull coins towards drone
				var pullStrength = (1 - distance / self.vacuumRange) * self.vacuumPower;
				coin.x += dx / distance * pullStrength * distance;
				coin.y += dy / distance * pullStrength * distance;
			}
		}
	};
	return self;
});
var Tower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('tower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Health bar
	self.maxHealth = 20;
	self.health = self.maxHealth;
	self.healthBar = new Text2('', {
		size: 24,
		fill: 0x00ff00
	});
	self.healthBar.anchor.set(0.5, 1);
	self.healthBar.y = -50;
	self.addChild(self.healthBar);
	self.updateHealthBar = function () {
		self.healthBar.setText(self.health + '/' + self.maxHealth);
		if (self.health > self.maxHealth * 0.5) {
			self.healthBar.fill = 0x00ff00;
		} else if (self.health > self.maxHealth * 0.25) {
			self.healthBar.fill = 0xffff00;
		} else {
			self.healthBar.fill = 0xff0000;
		}
	};
	self.updateHealthBar();
	// Repair button
	self.repairCost = 30;
	self.repairButton = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: 60,
		scaleX: 0.5,
		scaleY: 0.5
	});
	self.repairText = new Text2('Tamir: ' + self.repairCost, {
		size: 28,
		fill: 0xffffff
	});
	self.repairText.anchor.set(0.5, 0.5);
	self.repairText.y = 60;
	self.addChild(self.repairText);
	self.repairButton.visible = false;
	self.repairText.visible = false;
	self.down = function (x, y, obj) {
		// Show repair button if tower is damaged
		if (self.health < self.maxHealth) {
			self.repairButton.visible = true;
			self.repairText.visible = true;
		}
	};
	self.repairButton.down = function () {
		if (coinAmount >= self.repairCost && self.health < self.maxHealth) {
			coinAmount -= self.repairCost;
			self.health = self.maxHealth;
			self.updateHealthBar();
			self.repairButton.visible = false;
			self.repairText.visible = false;
		}
	};
	self.fireRate = 60;
	self.fireCooldown = 0;
	self.range = 300;
	self.damage = 1;
	self.takeDamage = function (dmg) {
		self.health -= dmg;
		self.updateHealthBar();
		if (self.health <= 0) {
			self.destroy();
			var idx = towers.indexOf(self);
			if (idx !== -1) towers.splice(idx, 1);
		}
	};
	self.update = function () {
		if (self.fireCooldown > 0) {
			self.fireCooldown--;
			return;
		}
		var closestZombie = null;
		var closestDistance = self.range;
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var dx = zombie.x - self.x;
			var dy = zombie.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestZombie = zombie;
			}
		}
		if (closestZombie) {
			var bullet = new Bullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.setDirection(closestZombie.x, closestZombie.y);
			bullet.damage = self.damage;
			bullets.push(bullet);
			game.addChild(bullet);
			self.fireCooldown = self.fireRate;
		}
		// Hide repair button if not needed
		if (self.health >= self.maxHealth) {
			self.repairButton.visible = false;
			self.repairText.visible = false;
		}
		// --- AUTO REPAIR LOGIC --- 
		if (self.autoRepair && self.health < self.maxHealth * 0.5) {
			// Only repair if not already at max and below 50%
			if (!self.repairIcon) {
				self.repairIcon = new Text2('🔧', {
					size: 48,
					fill: 0x00ffcc
				});
				self.repairIcon.anchor.set(0.5, 0.5);
				self.repairIcon.y = -80;
				self.addChild(self.repairIcon);
			}
			// Repair instantly, cost already paid
			self.health = self.maxHealth;
			self.updateHealthBar();
		} else if (self.repairIcon) {
			self.removeChild(self.repairIcon);
			self.repairIcon = null;
		}
	};
	return self;
});
var Trap = Container.expand(function () {
	var self = Container.call(this);
	var trapGraphics = self.attachAsset('trap', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Health bar
	self.maxHealth = 10;
	self.health = self.maxHealth;
	self.healthBar = new Text2('', {
		size: 20,
		fill: 0x00ff00
	});
	self.healthBar.anchor.set(0.5, 1);
	self.healthBar.y = -35;
	self.addChild(self.healthBar);
	self.updateHealthBar = function () {
		self.healthBar.setText(self.health + '/' + self.maxHealth);
		if (self.health > self.maxHealth * 0.5) {
			self.healthBar.fill = 0x00ff00;
		} else if (self.health > self.maxHealth * 0.25) {
			self.healthBar.fill = 0xffff00;
		} else {
			self.healthBar.fill = 0xff0000;
		}
	};
	self.updateHealthBar();
	self.takeDamage = function (dmg) {
		self.health -= dmg;
		self.updateHealthBar();
		if (self.health <= 0) {
			self.destroy();
			var idx = traps.indexOf(self);
			if (idx !== -1) traps.splice(idx, 1);
		}
	};
	self.damage = 2;
	self.cooldown = 0;
	self.maxCooldown = 120;
	self.update = function () {
		if (self.cooldown > 0) {
			self.cooldown--;
			trapGraphics.alpha = 0.5;
			return;
		}
		trapGraphics.alpha = 1;
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				self.cooldown = self.maxCooldown;
				break;
			}
		}
	};
	return self;
});
var UpgradePanel = Container.expand(function () {
	var self = Container.call(this);
	var panelGraphics = self.attachAsset('upgradePanel', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerButton = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: -200
	});
	var trapButton = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: -50
	});
	var healthButton = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: 100
	});
	var closeButton = self.attachAsset('upgradeButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: 250,
		scaleX: 0.3,
		scaleY: 0.8
	});
	self.towerText = new Text2('Tower - ' + towerCost + ' coins', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.towerText.anchor.set(0.5, 0.5);
	self.towerText.y = -200;
	self.addChild(self.towerText);
	self.trapText = new Text2('Trap - ' + trapCost + ' coins', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.trapText.anchor.set(0.5, 0.5);
	self.trapText.y = -50;
	self.addChild(self.trapText);
	self.healthText = new Text2('Repair Base - ' + healthCost + ' coins', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.healthText.anchor.set(0.5, 0.5);
	self.healthText.y = 100;
	self.addChild(self.healthText);
	self.closeText = new Text2('Close', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.closeText.anchor.set(0.5, 0.5);
	self.closeText.y = 250;
	self.addChild(self.closeText);
	towerButton.down = function () {
		if (coinAmount >= towerCost) {
			coinAmount -= towerCost;
			towerCost *= 2;
			self.towerText.setText('Tower - ' + towerCost + ' coins');
			var tower = new Tower();
			var angle = Math.random() * Math.PI * 2;
			var distance = 250 + Math.random() * 100;
			tower.x = base.x + Math.cos(angle) * distance;
			tower.y = base.y + Math.sin(angle) * distance;
			// Inherit auto-repair if already enabled
			if (typeof autoRepairActive !== "undefined" && autoRepairActive.length > 0) {
				tower.autoRepair = true;
				autoRepairActive.push(tower);
			}
			towers.push(tower);
			game.addChild(tower);
			LK.getSound('build').play();
			self.visible = false;
		}
	};
	trapButton.down = function () {
		if (coinAmount >= trapCost) {
			coinAmount -= trapCost;
			trapCost *= 2;
			self.trapText.setText('Trap - ' + trapCost + ' coins');
			var trap = new Trap();
			var angle = Math.random() * Math.PI * 2;
			var distance = 200 + Math.random() * 150;
			trap.x = base.x + Math.cos(angle) * distance;
			trap.y = base.y + Math.sin(angle) * distance;
			traps.push(trap);
			game.addChild(trap);
			LK.getSound('build').play();
			self.visible = false;
		}
	};
	healthButton.down = function () {
		if (coinAmount >= healthCost && base.health < base.maxHealth) {
			coinAmount -= healthCost;
			healthCost *= 2;
			self.healthText.setText('Repair Base - ' + healthCost + ' coins');
			base.health = Math.min(base.health + 20, base.maxHealth);
			self.visible = false;
		}
	};
	closeButton.down = function () {
		self.visible = false;
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 2;
	self.speed = 1.5;
	self.damage = 1;
	self.value = 10;
	self.update = function () {
		// Priority: nearest tower, then nearest trap, then base
		var target = null;
		var minDist = Infinity;
		// Find closest alive tower
		for (var i = 0; i < towers.length; i++) {
			var t = towers[i];
			if (t.health > 0) {
				var dx = t.x - self.x;
				var dy = t.y - self.y;
				var dist = Math.sqrt(dx * dx + dy * dy);
				if (dist < minDist) {
					minDist = dist;
					target = t;
				}
			}
		}
		// If no tower, find closest alive trap
		if (!target) {
			for (var i = 0; i < traps.length; i++) {
				var tr = traps[i];
				if (tr.health > 0) {
					var dx = tr.x - self.x;
					var dy = tr.y - self.y;
					var dist = Math.sqrt(dx * dx + dy * dy);
					if (dist < minDist) {
						minDist = dist;
						target = tr;
					}
				}
			}
		}
		// If no tower or trap, target base
		if (!target) {
			target = base;
		}
		var dx = target.x - self.x;
		var dy = target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		tween(zombieGraphics, {
			tint: 0xff0000
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(zombieGraphics, {
					tint: 0xffffff
				}, {
					duration: 100
				});
			}
		});
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var zombies = [];
var bullets = [];
var coins = [];
var towers = [];
var traps = [];
var base;
var character;
var upgradePanel;
var drone;
var coinAmount = 0;
var towerCost = 50;
var trapCost = 30;
var healthCost = 20;
var wave = 1;
var zombiesInWave = 5;
var zombiesSpawned = 0;
var waveDelay = 180;
var spawnTimer = 0;
// Coin drop multiplier, increases by 50% after each wave
var coinDropMultiplier = 1.0;
base = game.addChild(new Base());
base.x = 1024;
base.y = 1366;
character = game.addChild(new Character());
character.x = base.x;
character.y = base.y - 150;
drone = game.addChild(new Drone());
drone.x = base.x + 100;
drone.y = base.y;
upgradePanel = game.addChild(new UpgradePanel());
upgradePanel.x = 1024;
upgradePanel.y = 1366;
upgradePanel.visible = false;
var coinText = new Text2('Coins: 0', {
	size: 60,
	fill: 0xFFFF00
});
coinText.anchor.set(0.5, 0);
LK.gui.top.addChild(coinText);
var waveText = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveText.anchor.set(0.5, 0);
waveText.y = 70;
LK.gui.top.addChild(waveText);
var healthText = new Text2('Base Health: 100', {
	size: 50,
	fill: 0x00FF00
});
healthText.anchor.set(0.5, 1);
LK.gui.bottom.addChild(healthText);
// --- BOTTOM LEFT UPGRADE PANEL --- 
var panelWidth = 650;
var panelHeight = 420;
var bottomPanel = new Container();
var panelBg = LK.getAsset('upgradePanel', {
	anchorX: 0,
	anchorY: 1,
	width: panelWidth,
	height: panelHeight,
	x: 0,
	y: 0 // Panel background y=0, so the bottom aligns with the container's y=0
});
bottomPanel.addChild(panelBg);
// Add all panel content to the panel container so they are visible
bottomPanel.addChild(firepowerButton);
bottomPanel.addChild(firepowerText);
bottomPanel.addChild(firerateButton);
bottomPanel.addChild(firerateText);
bottomPanel.addChild(autoRepairButton);
bottomPanel.addChild(autoRepairText);
// Add to GUI bottom left (avoid 0,0 menu area)
bottomPanel.x = 0;
bottomPanel.y = 0; // y=0 in LK.gui.bottomLeft is the bottom of the screen, so panelBg.anchorY=1 aligns its bottom to this point
LK.gui.bottomLeft.addChild(bottomPanel);
// --- BUTTON LOGIC --- 
firepowerButton.down = function () {
	if (coinAmount >= firepowerCost) {
		coinAmount -= firepowerCost;
		firepowerCost *= 2;
		firepowerText.setText('Atış Gücü + (' + firepowerCost + ')');
		// Upgrade character and all towers
		character.damage = (character.damage || 1) + 1;
		for (var i = 0; i < towers.length; i++) {
			towers[i].damage = (towers[i].damage || 1) + 1;
		}
	}
};
firerateButton.down = function () {
	if (coinAmount >= firerateCost) {
		coinAmount -= firerateCost;
		firerateCost *= 2;
		firerateText.setText('Atış Hızı + (' + firerateCost + ')');
		// Upgrade character and all towers
		character.fireRate = Math.max(5, Math.floor(character.fireRate * 0.85));
		for (var i = 0; i < towers.length; i++) {
			towers[i].fireRate = Math.max(5, Math.floor(towers[i].fireRate * 0.85));
		}
	}
};
autoRepairButton.down = function () {
	var needed = towers.length * autoRepairCost;
	if (towers.length > 0 && coinAmount >= needed) {
		coinAmount -= needed;
		// Mark all towers as auto-repair enabled
		for (var i = 0; i < towers.length; i++) {
			towers[i].autoRepair = true;
			if (!autoRepairActive.includes(towers[i])) autoRepairActive.push(towers[i]);
		}
		autoRepairText.setText('Otomatik Tamir: Açık');
	}
};
game.down = function (x, y, obj) {
	if (!upgradePanel.visible) {
		character.shoot(x, y);
	}
};
game.update = function () {
	coinText.setText('Coins: ' + coinAmount);
	waveText.setText('Wave: ' + wave);
	healthText.setText('Base Health: ' + base.health);
	if (base.health > 50) {
		healthText.fill = 0x00ff00;
	} else if (base.health > 20) {
		healthText.fill = 0xffff00;
	} else {
		healthText.fill = 0xff0000;
	}
	if (waveDelay > 0) {
		waveDelay--;
	} else if (zombiesSpawned < zombiesInWave) {
		spawnTimer++;
		if (spawnTimer >= 60) {
			spawnTimer = 0;
			zombiesSpawned++;
			var zombie = new Zombie();
			var scale = Math.pow(1.15, wave - 1);
			zombie.health = Math.round(zombie.health * scale);
			zombie.speed = zombie.speed * scale;
			zombie.damage = Math.round(zombie.damage * scale);
			zombie.value = Math.round(zombie.value * scale);
			// Spawn zombies from outside the map edges
			var edge = Math.floor(Math.random() * 4); // 0: left, 1: right, 2: top, 3: bottom
			var spawnX, spawnY;
			if (edge === 0) {
				// left
				spawnX = -100;
				spawnY = Math.random() * 2732;
			} else if (edge === 1) {
				// right
				spawnX = 2048 + 100;
				spawnY = Math.random() * 2732;
			} else if (edge === 2) {
				// top
				spawnX = Math.random() * 2048;
				spawnY = -100;
			} else {
				// bottom
				spawnX = Math.random() * 2048;
				spawnY = 2732 + 100;
			}
			zombie.x = spawnX;
			zombie.y = spawnY;
			zombies.push(zombie);
			game.addChild(zombie);
		}
	} else if (zombies.length === 0) {
		wave++;
		zombiesInWave = Math.round((5 + wave * 2) * Math.pow(1.15, wave - 1));
		zombiesSpawned = 0;
		waveDelay = 180;
		// Increase coin drop multiplier by 50% after each wave
		coinDropMultiplier *= 1.5;
	}
	for (var i = zombies.length - 1; i >= 0; i--) {
		var zombie = zombies[i];
		var attacked = false;
		// Check towers
		for (var ti = 0; ti < towers.length; ti++) {
			var tower = towers[ti];
			if (tower.health > 0 && zombie.intersects(tower)) {
				tower.takeDamage(zombie.damage);
				zombie.destroy();
				zombies.splice(i, 1);
				attacked = true;
				break;
			}
		}
		if (attacked) continue;
		// Check traps
		for (var trpi = 0; trpi < traps.length; trpi++) {
			var trap = traps[trpi];
			if (trap.health > 0 && zombie.intersects(trap)) {
				trap.takeDamage(zombie.damage);
				zombie.destroy();
				zombies.splice(i, 1);
				attacked = true;
				break;
			}
		}
		if (attacked) continue;
		// Check base
		if (zombie.intersects(base)) {
			base.takeDamage(zombie.damage);
			zombie.destroy();
			zombies.splice(i, 1);
			continue;
		}
		for (var j = bullets.length - 1; j >= 0; j--) {
			var bullet = bullets[j];
			if (zombie.intersects(bullet)) {
				LK.getSound('zombieHit').play();
				if (zombie.takeDamage(bullet.damage)) {
					var coin = new Coin();
					coin.x = zombie.x;
					coin.y = zombie.y;
					// Apply coin drop multiplier
					coin.value = Math.round(zombie.value * coinDropMultiplier);
					coins.push(coin);
					game.addChild(coin);
					zombie.destroy();
					zombies.splice(i, 1);
				}
				bullet.destroy();
				bullets.splice(j, 1);
				break;
			}
		}
	}
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.x < -100 || bullet.x > 2148 || bullet.y < -100 || bullet.y > 2832) {
			bullet.destroy();
			bullets.splice(i, 1);
		}
	}
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		if (coin.lifetime <= 0) {
			coin.destroy();
			coins.splice(i, 1);
			continue;
		}
		var dx = character.x - coin.x;
		var dy = character.y - coin.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 100) {
			coinAmount += coin.value;
			LK.getSound('coinCollect').play();
			coin.destroy();
			coins.splice(i, 1);
			continue;
		}
		// Drone coin collection
		var droneDx = drone.x - coin.x;
		var droneDy = drone.y - coin.y;
		var droneDistance = Math.sqrt(droneDx * droneDx + droneDy * droneDy);
		if (droneDistance < drone.collectRange) {
			coinAmount += coin.value;
			LK.getSound('coinCollect').play();
			coin.destroy();
			coins.splice(i, 1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -654,64 +654,13 @@
 	x: 0,
 	y: 0 // Panel background y=0, so the bottom aligns with the container's y=0
 });
 bottomPanel.addChild(panelBg);
-// Firepower Upgrade Button
-var firepowerCost = 100;
-var firepowerButton = LK.getAsset('upgradeButton', {
-	anchorX: 0,
-	anchorY: 0,
-	x: 30,
-	y: panelHeight - 120,
-	width: 300,
-	height: 90
-});
-var firepowerText = new Text2('Atış Gücü + (100)', {
-	size: 36,
-	fill: 0xffffff
-});
-firepowerText.anchor.set(0, 0.5);
-firepowerText.x = 60;
-firepowerText.y = panelHeight - 75;
+// Add all panel content to the panel container so they are visible
 bottomPanel.addChild(firepowerButton);
 bottomPanel.addChild(firepowerText);
-// Fire Rate Upgrade Button
-var firerateCost = 100;
-var firerateButton = LK.getAsset('upgradeButton', {
-	anchorX: 0,
-	anchorY: 0,
-	x: 340,
-	y: panelHeight - 120,
-	width: 300,
-	height: 90
-});
-var firerateText = new Text2('Atış Hızı + (100)', {
-	size: 36,
-	fill: 0xffffff
-});
-firerateText.anchor.set(0, 0.5);
-firerateText.x = 370;
-firerateText.y = panelHeight - 75;
 bottomPanel.addChild(firerateButton);
 bottomPanel.addChild(firerateText);
-// Auto Repair Toggle Button
-var autoRepairCost = 100;
-var autoRepairActive = [];
-var autoRepairButton = LK.getAsset('upgradeButton', {
-	anchorX: 0,
-	anchorY: 0,
-	x: 30,
-	y: panelHeight - 220,
-	width: 610,
-	height: 90
-});
-var autoRepairText = new Text2('Otomatik Tamir: Kapalı (100 x kule)', {
-	size: 36,
-	fill: 0xffffff
-});
-autoRepairText.anchor.set(0, 0.5);
-autoRepairText.x = 60;
-autoRepairText.y = panelHeight - 175;
 bottomPanel.addChild(autoRepairButton);
 bottomPanel.addChild(autoRepairText);
 // Add to GUI bottom left (avoid 0,0 menu area)
 bottomPanel.x = 0;