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

/**** 
* Classes
****/ 
var Base = Container.expand(function () {
	var self = Container.call(this);
	var baseGraphics = self.attachAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 500;
	self.maxHealth = 500;
	self.isDead = false;
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			self.health = 0;
			self.isDead = true;
		}
	};
	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 = 8;
	self.damage = 25;
	self.targetX = 0;
	self.targetY = 0;
	self.isPlayerBullet = true;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < self.speed) {
			self.x = self.targetX;
			self.y = self.targetY;
			self.hasReachedTarget = true;
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	self.health = 100;
	self.maxHealth = 100;
	self.speed = 1;
	self.damage = 30;
	self.isDead = false;
	self.hasReachedBase = false;
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			self.health = 0;
			self.isDead = true;
		}
	};
	self.update = function () {
		if (self.isDead || self.hasReachedBase) return;
		var dx = playerBase.x - self.x;
		var dy = playerBase.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 80) {
			self.hasReachedBase = true;
			playerBase.takeDamage(self.damage);
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	return self;
});
var TheBigBoss = Enemy.expand(function () {
	var self = Enemy.call(this);
	var bigBossGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bigBossGraphics.tint = 0xFF0000; // Red color for the big boss
	bigBossGraphics.scaleX = 3.0; // Massive size
	bigBossGraphics.scaleY = 3.0;
	self.health = 1500 + waveNumber * 200;
	self.maxHealth = self.health;
	self.speed = 0.2; // Very slow but menacing
	self.damage = 250;
	self.attackRange = 500;
	self.attackCooldown = 0;
	self.attackDelay = 60; // 1 second
	self.megaAttackCooldown = 0;
	self.megaAttackDelay = 300; // 5 seconds
	self.spawnCooldown = 0;
	self.spawnDelay = 600; // 10 seconds
	self.isBoss = true;
	self.isHardModeOnly = true;
	self.update = function () {
		if (self.isDead || self.hasReachedBase) return;
		// Regular movement towards base
		var dx = playerBase.x - self.x;
		var dy = playerBase.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 120) {
			self.hasReachedBase = true;
			playerBase.takeDamage(self.damage);
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Continuous attack - shoots at nearest unit
		if (self.attackCooldown <= 0) {
			var nearestUnit = null;
			var shortestDistance = self.attackRange;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				if (unit.isDead) continue;
				var udx = unit.x - self.x;
				var udy = unit.y - self.y;
				var udistance = Math.sqrt(udx * udx + udy * udy);
				if (udistance < shortestDistance) {
					shortestDistance = udistance;
					nearestUnit = unit;
				}
			}
			if (nearestUnit) {
				var bigBossBullet = new Bullet();
				bigBossBullet.x = self.x;
				bigBossBullet.y = self.y;
				bigBossBullet.targetX = nearestUnit.x;
				bigBossBullet.targetY = nearestUnit.y;
				bigBossBullet.damage = 120;
				bigBossBullet.isPlayerBullet = false;
				bigBossBullet.speed = 8;
				bullets.push(bigBossBullet);
				game.addChild(bigBossBullet);
				self.attackCooldown = self.attackDelay;
			}
		}
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		// Mega attack - damages all units on screen
		if (self.megaAttackCooldown <= 0) {
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				if (!unit.isDead) {
					unit.takeDamage(80);
					createExplosion(unit.x, unit.y);
				}
			}
			// Screen flash effect
			LK.effects.flashScreen(0xFF0000, 500);
			self.megaAttackCooldown = self.megaAttackDelay;
		}
		if (self.megaAttackCooldown > 0) {
			self.megaAttackCooldown--;
		}
		// Spawn fast zombies
		if (self.spawnCooldown <= 0) {
			for (var j = 0; j < 3; j++) {
				var zombie = new FastZombie();
				zombie.x = self.x + (Math.random() - 0.5) * 200;
				zombie.y = self.y + (Math.random() - 0.5) * 200;
				enemies.push(zombie);
				game.addChild(zombie);
			}
			self.spawnCooldown = self.spawnDelay;
		}
		if (self.spawnCooldown > 0) {
			self.spawnCooldown--;
		}
	};
	return self;
});
var MegaBoss = Enemy.expand(function () {
	var self = Enemy.call(this);
	var megaBossGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	megaBossGraphics.tint = 0x4B0082;
	megaBossGraphics.scaleX = 2.0;
	megaBossGraphics.scaleY = 2.0;
	self.health = 800 + waveNumber * 100;
	self.maxHealth = self.health;
	self.speed = 0.3;
	self.damage = 150;
	self.attackRange = 400;
	self.attackCooldown = 0;
	self.attackDelay = 90;
	self.multiShotCooldown = 0;
	self.multiShotDelay = 240; // 4 seconds
	self.healCooldown = 0;
	self.healDelay = 600; // 10 seconds
	self.isBoss = true;
	self.update = function () {
		if (self.isDead || self.hasReachedBase) return;
		// Regular movement towards base
		var dx = playerBase.x - self.x;
		var dy = playerBase.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 80) {
			self.hasReachedBase = true;
			playerBase.takeDamage(self.damage);
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Multi-shot attack
		if (self.multiShotCooldown <= 0) {
			// Shoot at up to 3 different targets
			var targetsHit = 0;
			for (var i = 0; i < playerUnits.length && targetsHit < 3; i++) {
				var unit = playerUnits[i];
				if (unit.isDead) continue;
				var udx = unit.x - self.x;
				var udy = unit.y - self.y;
				var udistance = Math.sqrt(udx * udx + udy * udy);
				if (udistance <= self.attackRange) {
					var bossBullet = new Bullet();
					bossBullet.x = self.x;
					bossBullet.y = self.y;
					bossBullet.targetX = unit.x;
					bossBullet.targetY = unit.y;
					bossBullet.damage = 80;
					bossBullet.isPlayerBullet = false;
					bossBullet.speed = 7;
					bullets.push(bossBullet);
					game.addChild(bossBullet);
					targetsHit++;
				}
			}
			if (targetsHit > 0) {
				self.multiShotCooldown = self.multiShotDelay;
			}
		}
		if (self.multiShotCooldown > 0) {
			self.multiShotCooldown--;
		}
		// Self heal ability
		if (self.healCooldown <= 0 && self.health < self.maxHealth * 0.7) {
			self.health = Math.min(self.maxHealth, self.health + 200);
			self.healCooldown = self.healDelay;
			// Visual healing effect
			var healEffect = LK.getAsset('explosion', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: self.x,
				y: self.y,
				alpha: 0.7,
				scaleX: 0.5,
				scaleY: 0.5
			});
			healEffect.tint = 0x00FF00;
			game.addChild(healEffect);
			tween(healEffect, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 1000,
				onFinish: function onFinish() {
					healEffect.destroy();
				}
			});
		}
		if (self.healCooldown > 0) {
			self.healCooldown--;
		}
	};
	return self;
});
var FastZombie = Enemy.expand(function () {
	var self = Enemy.call(this);
	var zombieGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	zombieGraphics.tint = 0x800080; // Purple color for zombie
	zombieGraphics.scaleX = 0.8;
	zombieGraphics.scaleY = 0.8;
	self.health = 20;
	self.maxHealth = 20;
	self.speed = 3.5; // Very fast
	self.damage = 12;
	self.isHardModeOnly = true;
	return self;
});
var EnemyTank = Enemy.expand(function () {
	var self = Enemy.call(this);
	var tankGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 120;
	self.maxHealth = 120;
	self.speed = 0.8;
	self.damage = 40;
	return self;
});
var EnemySwarm = Enemy.expand(function () {
	var self = Enemy.call(this);
	var swarmGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	swarmGraphics.tint = 0xFFFF00;
	swarmGraphics.scaleX = 0.7;
	swarmGraphics.scaleY = 0.7;
	self.health = 25;
	self.maxHealth = 25;
	self.speed = 2.0;
	self.damage = 10;
	return self;
});
var EnemyShielder = Enemy.expand(function () {
	var self = Enemy.call(this);
	var shielderGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	shielderGraphics.tint = 0x4169E1;
	shielderGraphics.scaleX = 1.1;
	shielderGraphics.scaleY = 1.1;
	self.health = 180;
	self.maxHealth = 180;
	self.speed = 0.7;
	self.damage = 35;
	self.shieldActive = true;
	self.takeDamage = function (damage) {
		// Shielder takes reduced damage when shield is active
		var actualDamage = self.shieldActive ? damage * 0.5 : damage;
		self.health -= actualDamage;
		if (self.health <= 0) {
			self.health = 0;
			self.isDead = true;
		}
		// Shield breaks at half health
		if (self.health <= self.maxHealth * 0.5) {
			self.shieldActive = false;
			shielderGraphics.tint = 0xFF4500;
		}
	};
	return self;
});
var EnemyInfantry = Enemy.expand(function () {
	var self = Enemy.call(this);
	var infantryGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 50;
	self.maxHealth = 50;
	self.speed = 1.5;
	self.damage = 25;
	return self;
});
var EnemyHeavy = Enemy.expand(function () {
	var self = Enemy.call(this);
	var heavyGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	heavyGraphics.tint = 0x4B0082;
	heavyGraphics.scaleX = 1.2;
	heavyGraphics.scaleY = 1.2;
	self.health = 200;
	self.maxHealth = 200;
	self.speed = 0.6;
	self.damage = 60;
	return self;
});
var EnemyHealer = Enemy.expand(function () {
	var self = Enemy.call(this);
	var healerGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healerGraphics.tint = 0x9932CC;
	healerGraphics.scaleX = 0.8;
	healerGraphics.scaleY = 0.8;
	self.health = 60;
	self.maxHealth = 60;
	self.speed = 1.2;
	self.damage = 15;
	self.healRange = 200;
	self.healCooldown = 0;
	self.healDelay = 180; // 3 seconds at 60fps
	self.healPower = 30;
	self.update = function () {
		if (self.isDead || self.hasReachedBase) return;
		// Heal nearby enemies
		if (self.healCooldown <= 0) {
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				if (enemy !== self && !enemy.isDead && enemy.health < enemy.maxHealth) {
					var dx = enemy.x - self.x;
					var dy = enemy.y - self.y;
					var distance = Math.sqrt(dx * dx + dy * dy);
					if (distance <= self.healRange) {
						enemy.health = Math.min(enemy.maxHealth, enemy.health + self.healPower);
						self.healCooldown = self.healDelay;
						// Visual healing effect
						var healEffect = LK.getAsset('explosion', {
							anchorX: 0.5,
							anchorY: 0.5,
							x: enemy.x,
							y: enemy.y,
							alpha: 0.7,
							scaleX: 0.3,
							scaleY: 0.3
						});
						healEffect.tint = 0x00FF00;
						game.addChild(healEffect);
						tween(healEffect, {
							scaleX: 1,
							scaleY: 1,
							alpha: 0
						}, {
							duration: 800,
							onFinish: function onFinish() {
								healEffect.destroy();
							}
						});
						break;
					}
				}
			}
		}
		if (self.healCooldown > 0) {
			self.healCooldown--;
		}
		// Move towards base
		var dx = playerBase.x - self.x;
		var dy = playerBase.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 80) {
			self.hasReachedBase = true;
			playerBase.takeDamage(self.damage);
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	return self;
});
var EnemyFast = Enemy.expand(function () {
	var self = Enemy.call(this);
	var fastGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	fastGraphics.tint = 0x00FF00;
	self.health = 30;
	self.maxHealth = 30;
	self.speed = 2.5;
	self.damage = 15;
	return self;
});
var EnemyExploder = Enemy.expand(function () {
	var self = Enemy.call(this);
	var exploderGraphics = self.attachAsset('enemyInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	exploderGraphics.tint = 0xFF1493;
	exploderGraphics.scaleX = 0.9;
	exploderGraphics.scaleY = 0.9;
	self.health = 40;
	self.maxHealth = 40;
	self.speed = 1.8;
	self.damage = 20;
	self.explosionRadius = 150;
	self.explodeOnDeath = function () {
		// Damage nearby player units when exploder dies
		for (var i = 0; i < playerUnits.length; i++) {
			var unit = playerUnits[i];
			var dx = unit.x - self.x;
			var dy = unit.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= self.explosionRadius) {
				unit.takeDamage(50);
			}
		}
		// Visual explosion effect
		createExplosion(self.x, self.y);
	};
	return self;
});
var EnemyBoss = Enemy.expand(function () {
	var self = Enemy.call(this);
	var bossGraphics = self.attachAsset('enemyTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bossGraphics.tint = 0x8B0000;
	bossGraphics.scaleX = 1.5;
	bossGraphics.scaleY = 1.5;
	self.health = 400 + waveNumber * 50;
	self.maxHealth = self.health;
	self.speed = 0.4;
	self.damage = 100;
	self.attackRange = 300;
	self.attackCooldown = 0;
	self.attackDelay = 120; // 2 seconds
	self.specialAttackCooldown = 0;
	self.specialAttackDelay = 300; // 5 seconds
	self.isBoss = true;
	self.update = function () {
		if (self.isDead || self.hasReachedBase) return;
		// Regular movement towards base
		var dx = playerBase.x - self.x;
		var dy = playerBase.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 80) {
			self.hasReachedBase = true;
			playerBase.takeDamage(self.damage);
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Boss ranged attack
		if (self.attackCooldown <= 0) {
			// Find nearest player unit to attack
			var nearestUnit = null;
			var shortestDistance = self.attackRange;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				if (unit.isDead) continue;
				var udx = unit.x - self.x;
				var udy = unit.y - self.y;
				var udistance = Math.sqrt(udx * udx + udy * udy);
				if (udistance < shortestDistance) {
					shortestDistance = udistance;
					nearestUnit = unit;
				}
			}
			if (nearestUnit) {
				// Create boss bullet
				var bossBullet = new Bullet();
				bossBullet.x = self.x;
				bossBullet.y = self.y;
				bossBullet.targetX = nearestUnit.x;
				bossBullet.targetY = nearestUnit.y;
				bossBullet.damage = 60;
				bossBullet.isPlayerBullet = false;
				bossBullet.speed = 6;
				bullets.push(bossBullet);
				game.addChild(bossBullet);
				self.attackCooldown = self.attackDelay;
			}
		}
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		// Special area attack
		if (self.specialAttackCooldown <= 0) {
			// Damage all player units within range
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var udx = unit.x - self.x;
				var udy = unit.y - self.y;
				var udistance = Math.sqrt(udx * udx + udy * udy);
				if (udistance <= 400) {
					unit.takeDamage(40);
					createExplosion(unit.x, unit.y);
				}
			}
			self.specialAttackCooldown = self.specialAttackDelay;
		}
		if (self.specialAttackCooldown > 0) {
			self.specialAttackCooldown--;
		}
	};
	return self;
});
var PlayerUnit = Container.expand(function () {
	var self = Container.call(this);
	self.health = 100;
	self.maxHealth = 100;
	self.attackRange = 200;
	self.attackCooldown = 0;
	self.attackDelay = 60;
	self.damage = 25;
	self.unitType = 'tank';
	self.lastTarget = null;
	self.rangeIndicator = null;
	self.targetIndicator = null;
	self.showingAttackInfo = false;
	self.takeDamage = function (damage) {
		// In hard mode, all units except sword have 1 health
		if (isHardMode && self.unitType !== 'sword') {
			self.health = 1;
			self.maxHealth = 1;
		}
		// Only sword warriors can die, all other units are immortal
		if (self.unitType !== 'sword') {
			self.health -= damage;
			if (self.health <= 0) {
				self.health = 1; // Keep at least 1 health to prevent death
			}
		} else {
			// Sword warriors can still die normally
			self.health -= damage;
			if (self.health <= 0) {
				self.health = 0;
				self.isDead = true;
			}
		}
	};
	self.findNearestEnemy = function () {
		var nearestEnemy = null;
		var shortestDistance = self.attackRange;
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.isDead) continue;
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < shortestDistance) {
				shortestDistance = distance;
				nearestEnemy = enemy;
			}
		}
		return nearestEnemy;
	};
	self.attack = function (target) {
		if (self.attackCooldown <= 0) {
			var bullet = new Bullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.targetX = target.x;
			bullet.targetY = target.y;
			bullet.damage = self.damage;
			bullet.isPlayerBullet = true;
			bullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.attackCooldown = self.attackDelay;
			// Update target indicator position if visible
			if (self.showingAttackInfo && self.targetIndicator) {
				self.targetIndicator.x = target.x;
				self.targetIndicator.y = target.y;
			}
		}
	};
	self.showAttackInfo = function () {
		if (self.showingAttackInfo) return;
		// Create range indicator
		self.rangeIndicator = LK.getAsset('attackRange', {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.3,
			scaleX: self.attackRange / 5,
			scaleY: self.attackRange / 5
		});
		self.rangeIndicator.x = self.x;
		self.rangeIndicator.y = self.y;
		game.addChild(self.rangeIndicator);
		// Create target indicator if there's a current target
		var currentTarget = self.findNearestEnemy();
		if (currentTarget) {
			self.targetIndicator = LK.getAsset('targetIndicator', {
				anchorX: 0.5,
				anchorY: 0.5,
				alpha: 0.8
			});
			self.targetIndicator.x = currentTarget.x;
			self.targetIndicator.y = currentTarget.y;
			game.addChild(self.targetIndicator);
		}
		self.showingAttackInfo = true;
	};
	self.hideAttackInfo = function () {
		if (!self.showingAttackInfo) return;
		if (self.rangeIndicator) {
			self.rangeIndicator.destroy();
			self.rangeIndicator = null;
		}
		if (self.targetIndicator) {
			self.targetIndicator.destroy();
			self.targetIndicator = null;
		}
		self.showingAttackInfo = false;
	};
	self.down = function (x, y, obj) {
		// Hide attack info for all other units
		for (var i = 0; i < playerUnits.length; i++) {
			if (playerUnits[i] !== self) {
				playerUnits[i].hideAttackInfo();
			}
		}
		// Just show attack info without popup
		self.showAttackInfo();
	};
	self.update = function () {
		if (self.isDead) return;
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		var target = self.findNearestEnemy();
		if (target) {
			self.attack(target);
		}
	};
	return self;
});
var Tank = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var tankGraphics = self.attachAsset('playerTank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 150 + (upgrades.health - 1) * 30;
	self.maxHealth = self.health;
	self.attackRange = 250 + (upgrades.range - 1) * 25;
	self.attackDelay = 45;
	self.damage = 40 + (upgrades.damage - 1) * 10;
	self.unitType = 'tank';
	self.cost = 100;
	return self;
});
var SwordWarrior = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var swordGraphics = self.attachAsset('swordWarrior', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 120 + (upgrades.health - 1) * 25;
	self.maxHealth = self.health;
	self.attackRange = 80; // Short melee range
	self.attackDelay = 40;
	self.damage = 50 + (upgrades.damage - 1) * 12;
	self.unitType = 'sword';
	self.cost = 90;
	self.speed = 2.5; // Fast movement to reach enemies
	self.currentTarget = null;
	self.isMovingToTarget = false;
	self.killCount = 0; // Track how many enemies killed
	self.maxKills = 4; // Die after 4 kills
	self.findNearestEnemy = function () {
		var nearestEnemy = null;
		var shortestDistance = 600; // Search range much larger than attack range
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.isDead) continue;
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < shortestDistance) {
				shortestDistance = distance;
				nearestEnemy = enemy;
			}
		}
		return nearestEnemy;
	};
	self.attack = function (target) {
		if (self.attackCooldown <= 0) {
			// Store target health before attack to check if it will die
			var targetWillDie = target.health <= self.damage;
			// Melee attack - damage directly without bullet
			target.takeDamage(self.damage);
			createExplosion(target.x, target.y);
			LK.getSound('shoot').play();
			self.attackCooldown = self.attackDelay;
			// If target died from this attack, increment kill count
			if (targetWillDie && target.health <= 0) {
				self.killCount++;
				// Die after killing 4 enemies
				if (self.killCount >= self.maxKills) {
					self.isDead = true;
				}
			}
		}
	};
	self.update = function () {
		if (self.isDead) {
			// Create death explosion effect
			createExplosion(self.x, self.y);
			return;
		}
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		var target = self.findNearestEnemy();
		if (target) {
			var dx = target.x - self.x;
			var dy = target.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= self.attackRange) {
				// In attack range - attack the target
				self.attack(target);
				self.isMovingToTarget = false;
			} else {
				// Move towards the target
				self.isMovingToTarget = true;
				self.x += dx / distance * self.speed;
				self.y += dy / distance * self.speed;
			}
			self.currentTarget = target;
		} else {
			self.currentTarget = null;
			self.isMovingToTarget = false;
		}
	};
	return self;
});
var Sniper = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var sniperGraphics = self.attachAsset('playerInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	sniperGraphics.tint = 0x800080;
	sniperGraphics.scaleX = 1.2;
	sniperGraphics.scaleY = 1.2;
	self.health = 50 + (upgrades.health - 1) * 12;
	self.maxHealth = self.health;
	self.attackRange = Math.min(2048, 1638); // 80% of arena width (2048 * 0.8)
	self.attackDelay = 180; // Very slow (3 seconds)
	self.damage = 80 + (upgrades.damage - 1) * 20;
	self.unitType = 'sniper';
	self.cost = 150;
	return self;
});
var Infantry = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var infantryGraphics = self.attachAsset('playerInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 60 + (upgrades.health - 1) * 15;
	self.maxHealth = self.health;
	self.attackRange = 150 + (upgrades.range - 1) * 15;
	self.attackDelay = 30;
	self.damage = 20 + (upgrades.damage - 1) * 5;
	self.unitType = 'infantry';
	self.cost = 50;
	return self;
});
var Artillery = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var artilleryGraphics = self.attachAsset('playerArtillery', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 80 + (upgrades.health - 1) * 20;
	self.maxHealth = self.health;
	self.attackRange = 350 + (upgrades.range - 1) * 35;
	self.attackDelay = 90;
	self.damage = 60 + (upgrades.damage - 1) * 15;
	self.unitType = 'artillery';
	self.cost = 120;
	return self;
});
var Archer = PlayerUnit.expand(function () {
	var self = PlayerUnit.call(this);
	var archerGraphics = self.attachAsset('playerInfantry', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	archerGraphics.tint = 0x8B4513;
	self.health = 70 + (upgrades.health - 1) * 18;
	self.maxHealth = self.health;
	self.attackRange = 300 + (upgrades.range - 1) * 30;
	self.attackDelay = 50;
	self.damage = 40 + (upgrades.damage - 1) * 10;
	self.unitType = 'archer';
	self.cost = 80;
	return self;
});
var UnitUpgradePopup = Container.expand(function () {
	var self = Container.call(this);
	// Create popup background
	var popupBg = LK.getAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 6,
		scaleY: 4.5,
		alpha: 0.9
	});
	self.addChild(popupBg);
	popupBg.tint = 0x333333;
	// Create upgrade buttons
	// Create damage button background
	var damageBtnBg = LK.getAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.5,
		scaleY: 1.2,
		alpha: 0.7
	});
	damageBtnBg.x = -200;
	damageBtnBg.y = -80;
	damageBtnBg.tint = 0x4a4a4a;
	self.addChild(damageBtnBg);
	var damageUpgradeBtn = new Text2('DAMAGE + (75)', {
		size: 50,
		fill: 0xFFFFFF
	});
	damageUpgradeBtn.anchor.set(0.5, 0.5);
	damageUpgradeBtn.x = -200;
	damageUpgradeBtn.y = -80;
	self.addChild(damageUpgradeBtn);
	// Create health button background
	var healthBtnBg = LK.getAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.5,
		scaleY: 1.2,
		alpha: 0.7
	});
	healthBtnBg.x = 200;
	healthBtnBg.y = -80;
	healthBtnBg.tint = 0x4a4a4a;
	self.addChild(healthBtnBg);
	var healthUpgradeBtn = new Text2('HEALTH + (75)', {
		size: 50,
		fill: 0xFFFFFF
	});
	healthUpgradeBtn.anchor.set(0.5, 0.5);
	healthUpgradeBtn.x = 200;
	healthUpgradeBtn.y = -80;
	self.addChild(healthUpgradeBtn);
	// Create range button background
	var rangeBtnBg = LK.getAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.5,
		scaleY: 1.2,
		alpha: 0.7
	});
	rangeBtnBg.x = 0;
	rangeBtnBg.y = 80;
	rangeBtnBg.tint = 0x4a4a4a;
	self.addChild(rangeBtnBg);
	var rangeUpgradeBtn = new Text2('RANGE + (75)', {
		size: 50,
		fill: 0xFFFFFF
	});
	rangeUpgradeBtn.anchor.set(0.5, 0.5);
	rangeUpgradeBtn.x = 0;
	rangeUpgradeBtn.y = 80;
	self.addChild(rangeUpgradeBtn);
	self.targetUnit = null;
	self.upgradeCost = 75;
	self.show = function (unit) {
		self.targetUnit = unit;
		self.x = unit.x;
		self.y = unit.y - 100;
		self.visible = true;
	};
	self.hide = function () {
		if (self.targetUnit) {
			self.targetUnit.hideAttackInfo();
		}
		self.visible = false;
		self.targetUnit = null;
	};
	damageUpgradeBtn.down = function () {
		if (self.targetUnit && resources >= self.upgradeCost) {
			resources -= self.upgradeCost;
			self.targetUnit.damage += 15;
			resourceText.setText('Resources: ' + resources);
			self.hide();
		}
	};
	healthUpgradeBtn.down = function () {
		if (self.targetUnit && resources >= self.upgradeCost) {
			resources -= self.upgradeCost;
			self.targetUnit.health += 50;
			self.targetUnit.maxHealth += 50;
			resourceText.setText('Resources: ' + resources);
			self.hide();
		}
	};
	rangeUpgradeBtn.down = function () {
		if (self.targetUnit && resources >= self.upgradeCost) {
			resources -= self.upgradeCost;
			self.targetUnit.attackRange += 50;
			resourceText.setText('Resources: ' + resources);
			self.hide();
		}
	};
	self.visible = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2F4F2F
});

/**** 
* Game Code
****/ 
var playerUnits = [];
var enemies = [];
var bullets = [];
var explosions = [];
var resources = 200;
var maxResources = 500;
var resourceRegenRate = 1;
var resourceRegenTimer = 0;
var waveNumber = 1;
var enemiesSpawned = 0;
var enemiesPerWave = 5;
var spawnTimer = 0;
var spawnDelay = 120;
var timeBetweenWaves = 300;
var waveTimer = 0;
var isWaveActive = false;
var selectedUnitType = 'tank';
var unitCosts = {
	tank: 100,
	artillery: 120,
	infantry: 50,
	sword: 90,
	sniper: 150
};
var isHardMode = true;
// Create unit upgrade popup
var unitUpgradePopup = game.addChild(new UnitUpgradePopup());
// Initialize upgrade system
var upgrades = {
	damage: 1,
	health: 1,
	range: 1
};
var upgradeBaseCost = 150;
// Create player base
var playerBase = game.addChild(new Base());
playerBase.x = 1024;
playerBase.y = 2400;
// Set base health to 1 in hard mode
if (isHardMode) {
	playerBase.health = 1;
	playerBase.maxHealth = 1;
}
// Place 1 archer inside the base with double tank range
var defenseArcher = game.addChild(new Archer());
defenseArcher.x = 1024;
defenseArcher.y = 2400; // Same position as base
defenseArcher.attackRange = 500; // Double the tank's base range (250 * 2)
playerUnits.push(defenseArcher);
// Create UI elements
var resourceText = new Text2('Resources: ' + resources, {
	size: 40,
	fill: 0xFFFFFF
});
resourceText.anchor.set(0, 0);
LK.gui.topLeft.addChild(resourceText);
resourceText.x = 120;
resourceText.y = 20;
var waveText = new Text2('Wave: ' + waveNumber, {
	size: 40,
	fill: 0xFFFFFF
});
waveText.anchor.set(0.5, 0);
LK.gui.top.addChild(waveText);
waveText.y = 140;
var baseHealthText = new Text2('Base Health: ' + playerBase.health, {
	size: 40,
	fill: 0xFFFFFF
});
baseHealthText.anchor.set(1, 0);
LK.gui.topRight.addChild(baseHealthText);
baseHealthText.x = -20;
baseHealthText.y = 20;
var scoreText = new Text2('Score: 0', {
	size: 40,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
LK.gui.topLeft.addChild(scoreText);
scoreText.x = 120;
scoreText.y = 70;
// Unit selection buttons with square backgrounds
var tankButtonBg = LK.getAsset('playerTank', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: 2,
	scaleY: 2
});
LK.gui.bottom.addChild(tankButtonBg);
tankButtonBg.x = -500;
tankButtonBg.y = -20;
var tankButton = new Text2('TANK (100)', {
	size: 35,
	fill: 0xFFFFFF
});
tankButton.anchor.set(0.5, 1);
LK.gui.bottom.addChild(tankButton);
tankButton.x = -500;
tankButton.y = -80;
var artilleryButtonBg = LK.getAsset('playerArtillery', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: 2,
	scaleY: 2
});
LK.gui.bottom.addChild(artilleryButtonBg);
artilleryButtonBg.x = -200;
artilleryButtonBg.y = -20;
var artilleryButton = new Text2('ARTILLERY (120)', {
	size: 35,
	fill: 0xFFFFFF
});
artilleryButton.anchor.set(0.5, 1);
LK.gui.bottom.addChild(artilleryButton);
artilleryButton.x = -200;
artilleryButton.y = -80;
var infantryButtonBg = LK.getAsset('playerInfantry', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: 2,
	scaleY: 2
});
LK.gui.bottom.addChild(infantryButtonBg);
infantryButtonBg.x = 100;
infantryButtonBg.y = -20;
var infantryButton = new Text2('INFANTRY (50)', {
	size: 35,
	fill: 0xFFFFFF
});
infantryButton.anchor.set(0.5, 1);
LK.gui.bottom.addChild(infantryButton);
infantryButton.x = 100;
infantryButton.y = -80;
var swordButtonBg = LK.getAsset('swordWarrior', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: 2,
	scaleY: 2
});
LK.gui.bottom.addChild(swordButtonBg);
swordButtonBg.x = 350;
swordButtonBg.y = -20;
var swordButton = new Text2('SWORD (90)', {
	size: 35,
	fill: 0xFFFFFF
});
swordButton.anchor.set(0.5, 1);
LK.gui.bottom.addChild(swordButton);
swordButton.x = 350;
swordButton.y = -80;
var sniperButtonBg = LK.getAsset('playerInfantry', {
	anchorX: 0.5,
	anchorY: 1,
	scaleX: 2,
	scaleY: 2
});
sniperButtonBg.tint = 0x800080;
LK.gui.bottom.addChild(sniperButtonBg);
sniperButtonBg.x = 550;
sniperButtonBg.y = -20;
sniperButtonBg.visible = isHardMode;
var sniperButton = new Text2('SNIPER (150)', {
	size: 35,
	fill: 0xFFFFFF
});
sniperButton.anchor.set(0.5, 1);
LK.gui.bottom.addChild(sniperButton);
sniperButton.x = 550;
sniperButton.y = -80;
sniperButton.visible = isHardMode;
// Create upgrade buttons
var damageUpgradeButton = new Text2('DMG LV' + upgrades.damage + ' (' + upgradeBaseCost * upgrades.damage + ')', {
	size: 50,
	fill: 0xFFFFFF
});
damageUpgradeButton.anchor.set(1, 0);
LK.gui.topRight.addChild(damageUpgradeButton);
damageUpgradeButton.x = -20;
damageUpgradeButton.y = 70;
var healthUpgradeButton = new Text2('HP LV' + upgrades.health + ' (' + upgradeBaseCost * upgrades.health + ')', {
	size: 50,
	fill: 0xFFFFFF
});
healthUpgradeButton.anchor.set(1, 0);
LK.gui.topRight.addChild(healthUpgradeButton);
healthUpgradeButton.x = -20;
healthUpgradeButton.y = 130;
var rangeUpgradeButton = new Text2('RNG LV' + upgrades.range + ' (' + upgradeBaseCost * upgrades.range + ')', {
	size: 50,
	fill: 0xFFFFFF
});
rangeUpgradeButton.anchor.set(1, 0);
LK.gui.topRight.addChild(rangeUpgradeButton);
rangeUpgradeButton.x = -20;
rangeUpgradeButton.y = 190;
// Create modes button
var modesButtonBg = LK.getAsset('playerBase', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 2.5,
	scaleY: 1.2,
	alpha: 0.8
});
modesButtonBg.tint = 0x4a4a4a;
LK.gui.top.addChild(modesButtonBg);
modesButtonBg.x = 0;
modesButtonBg.y = 80;
var modesButton = new Text2('MODES', {
	size: 45,
	fill: 0xFFFFFF
});
modesButton.anchor.set(0.5, 0.5);
LK.gui.top.addChild(modesButton);
modesButton.x = 0;
modesButton.y = 80;
function updateSelectedUnit() {
	tankButtonBg.tint = selectedUnitType === 'tank' ? 0xFFFF00 : 0x4169E1;
	artilleryButtonBg.tint = selectedUnitType === 'artillery' ? 0xFFFF00 : 0x8B4513;
	infantryButtonBg.tint = selectedUnitType === 'infantry' ? 0xFFFF00 : 0x228B22;
	swordButtonBg.tint = selectedUnitType === 'sword' ? 0xFFFF00 : 0xb8860b;
	if (isHardMode) {
		sniperButtonBg.tint = selectedUnitType === 'sniper' ? 0xFFFF00 : 0x800080;
	}
}
updateSelectedUnit();
tankButtonBg.down = function () {
	selectedUnitType = 'tank';
	updateSelectedUnit();
};
artilleryButtonBg.down = function () {
	selectedUnitType = 'artillery';
	updateSelectedUnit();
};
infantryButtonBg.down = function () {
	selectedUnitType = 'infantry';
	updateSelectedUnit();
};
swordButtonBg.down = function () {
	selectedUnitType = 'sword';
	updateSelectedUnit();
};
sniperButtonBg.down = function () {
	if (isHardMode) {
		selectedUnitType = 'sniper';
		updateSelectedUnit();
	}
};
damageUpgradeButton.down = function () {
	var cost = upgradeBaseCost * upgrades.damage;
	if (resources >= cost && upgrades.damage < 10) {
		resources -= cost;
		upgrades.damage++;
		storage.damageLevel = upgrades.damage;
		damageUpgradeButton.setText('DMG LV' + upgrades.damage + ' (' + upgradeBaseCost * upgrades.damage + ')');
		resourceText.setText('Resources: ' + resources);
	}
};
healthUpgradeButton.down = function () {
	var cost = upgradeBaseCost * upgrades.health;
	if (resources >= cost && upgrades.health < 10) {
		resources -= cost;
		upgrades.health++;
		storage.healthLevel = upgrades.health;
		healthUpgradeButton.setText('HP LV' + upgrades.health + ' (' + upgradeBaseCost * upgrades.health + ')');
		resourceText.setText('Resources: ' + resources);
	}
};
rangeUpgradeButton.down = function () {
	var cost = upgradeBaseCost * upgrades.range;
	if (resources >= cost && upgrades.range < 10) {
		resources -= cost;
		upgrades.range++;
		storage.rangeLevel = upgrades.range;
		rangeUpgradeButton.setText('RNG LV' + upgrades.range + ' (' + upgradeBaseCost * upgrades.range + ')');
		resourceText.setText('Resources: ' + resources);
	}
};
// Create hard mode popup (initially hidden)
var hardModePopupBg = LK.getAsset('playerBase', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 8,
	scaleY: 5,
	alpha: 0.95
});
hardModePopupBg.tint = 0x1a1a1a;
LK.gui.center.addChild(hardModePopupBg);
hardModePopupBg.x = 0;
hardModePopupBg.y = 0;
hardModePopupBg.visible = false;
var hardModeButton = new Text2('HARD MODE ACTIVE', {
	size: 60,
	fill: 0x00FF00
});
hardModeButton.anchor.set(0.5, 0.5);
LK.gui.center.addChild(hardModeButton);
hardModeButton.x = 0;
hardModeButton.y = -50;
hardModeButton.visible = false;
var closePopupButton = new Text2('CLOSE', {
	size: 45,
	fill: 0xFFFFFF
});
closePopupButton.anchor.set(0.5, 0.5);
LK.gui.center.addChild(closePopupButton);
closePopupButton.x = 0;
closePopupButton.y = 100;
closePopupButton.visible = false;
hardModeButton.down = function () {
	// Activate hard mode
	isHardMode = true;
	hardModeButton.setText('HARD MODE ACTIVE');
	hardModeButton.tint = 0x00FF00;
	// Show sniper button in hard mode
	sniperButtonBg.visible = true;
	sniperButton.visible = true;
	updateSelectedUnit();
	// Close the popup
	hardModePopupBg.visible = false;
	hardModeButton.visible = false;
	closePopupButton.visible = false;
};
closePopupButton.down = function () {
	hardModePopupBg.visible = false;
	hardModeButton.visible = false;
	closePopupButton.visible = false;
};
modesButton.down = function () {
	// Show hard mode popup
	hardModePopupBg.visible = true;
	hardModeButton.visible = true;
	closePopupButton.visible = true;
};
function spawnEnemy() {
	var enemy;
	var spawnSide = Math.floor(Math.random() * 4);
	var spawnX, spawnY;
	// Random spawn from edges
	switch (spawnSide) {
		case 0:
			// Top
			spawnX = Math.random() * 2048;
			spawnY = 0;
			break;
		case 1:
			// Right
			spawnX = 2048;
			spawnY = Math.random() * 1500;
			break;
		case 2:
			// Left
			spawnX = 0;
			spawnY = Math.random() * 1500;
			break;
		case 3:
			// Top corners
			spawnX = Math.random() < 0.5 ? 0 : 2048;
			spawnY = Math.random() * 500;
			break;
	}
	// Boss waves every 5 waves, or every wave in hard mode
	if (waveNumber % 5 === 0 || isHardMode && Math.random() < 0.3) {
		// Boss wave - spawn boss in center top
		spawnX = 1024;
		spawnY = 0;
		if (waveNumber >= 15 && isHardMode) {
			// The Big Boss for hard mode high waves
			enemy = new TheBigBoss();
		} else if (waveNumber >= 15) {
			// Mega boss for higher waves
			enemy = new MegaBoss();
		} else {
			// Regular boss
			enemy = new EnemyBoss();
		}
	} else {
		// Different enemies based on wave number
		var enemyType = Math.random();
		if (waveNumber <= 3) {
			// Early waves: Basic infantry and some tanks
			if (enemyType < 0.7) {
				enemy = new EnemyInfantry();
			} else {
				enemy = new EnemyTank();
			}
		} else if (waveNumber <= 6) {
			// Mid-early waves: Add fast enemies
			if (enemyType < 0.4) {
				enemy = new EnemyInfantry();
			} else if (enemyType < 0.7) {
				enemy = new EnemyTank();
			} else if (enemyType < 0.85) {
				enemy = new EnemyFast();
			} else if (isHardMode) {
				enemy = new FastZombie();
			} else {
				enemy = new EnemyFast();
			}
		} else if (waveNumber <= 10) {
			// Mid waves: Add heavy enemies
			if (enemyType < 0.3) {
				enemy = new EnemyInfantry();
			} else if (enemyType < 0.5) {
				enemy = new EnemyTank();
			} else if (enemyType < 0.65) {
				enemy = new EnemyFast();
			} else if (enemyType < 0.8) {
				enemy = new EnemyHeavy();
			} else if (isHardMode) {
				enemy = new FastZombie();
			} else {
				enemy = new EnemyHeavy();
			}
		} else if (waveNumber <= 15) {
			// Late-mid waves: Add swarm enemies
			if (enemyType < 0.2) {
				enemy = new EnemyInfantry();
			} else if (enemyType < 0.4) {
				enemy = new EnemyTank();
			} else if (enemyType < 0.6) {
				enemy = new EnemyFast();
			} else if (enemyType < 0.8) {
				enemy = new EnemyHeavy();
			} else {
				enemy = new EnemySwarm();
			}
		} else if (waveNumber <= 20) {
			// Advanced waves: Add special enemies
			if (enemyType < 0.1) {
				enemy = new EnemyInfantry();
			} else if (enemyType < 0.2) {
				enemy = new EnemyTank();
			} else if (enemyType < 0.3) {
				enemy = new EnemyFast();
			} else if (enemyType < 0.4) {
				enemy = new EnemyHeavy();
			} else if (enemyType < 0.5) {
				enemy = new EnemySwarm();
			} else if (enemyType < 0.6) {
				enemy = new EnemyShielder();
			} else if (enemyType < 0.7) {
				enemy = new EnemyExploder();
			} else if (enemyType < 0.8) {
				enemy = new EnemyHealer();
			} else if (enemyType < 0.9) {
				enemy = new EnemyBoss();
			} else if (isHardMode) {
				enemy = new FastZombie();
			} else {
				enemy = new EnemyBoss();
			}
		} else {
			// Ultimate waves: All enemy types with higher spawn rates for special enemies
			if (enemyType < 0.05) {
				enemy = new EnemyInfantry();
			} else if (enemyType < 0.1) {
				enemy = new EnemyTank();
			} else if (enemyType < 0.2) {
				enemy = new EnemyFast();
			} else if (enemyType < 0.35) {
				enemy = new EnemyHeavy();
			} else if (enemyType < 0.45) {
				enemy = new EnemySwarm();
			} else if (enemyType < 0.6) {
				enemy = new EnemyShielder();
			} else if (enemyType < 0.75) {
				enemy = new EnemyExploder();
			} else if (enemyType < 0.85) {
				enemy = new EnemyHealer();
			} else {
				enemy = new EnemyBoss();
			}
		}
	}
	enemy.x = spawnX;
	enemy.y = spawnY;
	// Bosses don't get additional speed/health scaling to maintain their unique stats
	if (!enemy.isBoss) {
		enemy.speed += Math.random() * 0.5 + waveNumber * 0.1;
		// In hard mode, make all enemies much faster
		if (isHardMode) {
			enemy.speed *= 2.5; // 2.5x faster in hard mode
			// FastZombie gets even more speed boost in hard mode
			if (enemy.isHardModeOnly) {
				enemy.speed *= 1.5; // Additional 1.5x for FastZombie (total 3.75x)
			}
		}
		enemy.health += waveNumber * 10;
		enemy.maxHealth = enemy.health;
	}
	enemies.push(enemy);
	game.addChild(enemy);
}
function createExplosion(x, y) {
	var explosion = LK.getAsset('explosion', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: x,
		y: y,
		alpha: 1,
		scaleX: 0.5,
		scaleY: 0.5
	});
	game.addChild(explosion);
	tween(explosion, {
		scaleX: 2,
		scaleY: 2,
		alpha: 0
	}, {
		duration: 500,
		onFinish: function onFinish() {
			explosion.destroy();
		}
	});
	LK.getSound('explosion').play();
}
game.down = function (x, y, obj) {
	// Hide attack info for all units when clicking elsewhere
	for (var i = 0; i < playerUnits.length; i++) {
		playerUnits[i].hideAttackInfo();
	}
	// Check if click is on battlefield (not on UI) or near the base
	var nearBase = false;
	var distanceToBase = Math.sqrt((x - playerBase.x) * (x - playerBase.x) + (y - playerBase.y) * (y - playerBase.y));
	if (distanceToBase <= 300) {
		nearBase = true;
	}
	if (y > 200 && y < 2200 || nearBase) {
		var cost = unitCosts[selectedUnitType];
		if (resources >= cost) {
			var unit;
			switch (selectedUnitType) {
				case 'tank':
					unit = new Tank();
					break;
				case 'artillery':
					unit = new Artillery();
					break;
				case 'infantry':
					unit = new Infantry();
					break;
				case 'sword':
					unit = new SwordWarrior();
					break;
				case 'sniper':
					if (isHardMode) {
						unit = new Sniper();
					}
					break;
			}
			unit.x = x;
			unit.y = y;
			playerUnits.push(unit);
			game.addChild(unit);
			resources -= cost;
			resourceText.setText('Resources: ' + resources);
		}
	}
};
game.update = function () {
	// Resource regeneration
	resourceRegenTimer++;
	if (resourceRegenTimer >= 60) {
		if (resources < maxResources) {
			resources += resourceRegenRate;
			resourceText.setText('Resources: ' + resources);
		}
		resourceRegenTimer = 0;
	}
	// Wave management
	if (!isWaveActive) {
		waveTimer++;
		var currentTimeBetweenWaves = timeBetweenWaves;
		// In hard mode, much shorter time between waves
		if (isHardMode) {
			currentTimeBetweenWaves = Math.max(30, timeBetweenWaves / 6); // 6x faster wave progression, minimum 30 frames
		}
		if (waveTimer >= currentTimeBetweenWaves) {
			isWaveActive = true;
			enemiesSpawned = 0;
			waveTimer = 0;
			// Boss waves have fewer enemies but they're stronger
			if (waveNumber % 5 === 0) {
				enemiesPerWave = isHardMode ? 3 : 1; // Hard mode: 3 bosses, normal: 1 boss
			} else {
				var baseEnemies = 5 + waveNumber * 2;
				enemiesPerWave = isHardMode ? baseEnemies * 5 : baseEnemies; // Hard mode: 5x enemies
			}
		}
	} else {
		spawnTimer++;
		// Boss waves spawn immediately, regular waves use spawn delay
		var currentSpawnDelay = waveNumber % 5 === 0 ? 0 : spawnDelay;
		// In hard mode, make spawning much faster
		if (isHardMode) {
			currentSpawnDelay = Math.max(5, currentSpawnDelay / 8); // 8x faster spawning, minimum 5 frames
		}
		if (spawnTimer >= currentSpawnDelay && enemiesSpawned < enemiesPerWave) {
			spawnEnemy();
			enemiesSpawned++;
			spawnTimer = 0;
		}
		// Check if wave is complete
		if (enemiesSpawned >= enemiesPerWave && enemies.length === 0) {
			isWaveActive = false;
			waveNumber++;
			waveText.setText('Wave: ' + waveNumber);
			LK.setScore(LK.getScore() + 100);
			scoreText.setText('Score: ' + LK.getScore());
			// Award 30 resources for completing the wave
			resources += 30;
			resourceText.setText('Resources: ' + resources);
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		if (bullet.hasReachedTarget || bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			if (bullet.hasReachedTarget) {
				createExplosion(bullet.x, bullet.y);
			}
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet collisions
		if (bullet.isPlayerBullet) {
			// Player bullets hit enemies
			for (var j = enemies.length - 1; j >= 0; j--) {
				var enemy = enemies[j];
				if (!enemy.isDead && bullet.intersects(enemy)) {
					enemy.takeDamage(bullet.damage);
					createExplosion(bullet.x, bullet.y);
					if (enemy.isDead) {
						// Check if this was an exploder and trigger explosion
						if (enemy.explodeOnDeath) {
							enemy.explodeOnDeath();
						}
						// Boss kills give more points
						var scoreReward = enemy.isBoss ? 500 : 25;
						LK.setScore(LK.getScore() + scoreReward);
						scoreText.setText('Score: ' + LK.getScore());
						// Award resources for each enemy killed (5 in hard mode, 3 in normal)
						resources += isHardMode ? 5 : 3;
						resourceText.setText('Resources: ' + resources);
						enemy.destroy();
						enemies.splice(j, 1);
					}
					bullet.destroy();
					bullets.splice(i, 1);
					break;
				}
			}
		} else {
			// Enemy/Boss bullets hit player units
			for (var j = playerUnits.length - 1; j >= 0; j--) {
				var unit = playerUnits[j];
				if (!unit.isDead && bullet.intersects(unit)) {
					unit.takeDamage(bullet.damage);
					createExplosion(bullet.x, bullet.y);
					if (unit.isDead) {
						unit.destroy();
						playerUnits.splice(j, 1);
					}
					bullet.destroy();
					bullets.splice(i, 1);
					break;
				}
			}
		}
	}
	// Update player units
	for (var i = playerUnits.length - 1; i >= 0; i--) {
		var unit = playerUnits[i];
		unit.update();
		if (unit.isDead) {
			unit.destroy();
			playerUnits.splice(i, 1);
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		enemy.update();
		if (enemy.isDead) {
			// Check if this was an exploder and trigger explosion
			if (enemy.explodeOnDeath) {
				enemy.explodeOnDeath();
			}
			// Award resources for each enemy killed (5 in hard mode, 3 in normal)
			resources += isHardMode ? 5 : 3;
			resourceText.setText('Resources: ' + resources);
			enemy.destroy();
			enemies.splice(i, 1);
		} else if (enemy.hasReachedBase) {
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
	// Update base health display
	baseHealthText.setText('Base Health: ' + playerBase.health);
	// Check game over condition
	if (playerBase.isDead) {
		LK.showGameOver();
	}
	// Check win condition (survive 20 waves)
	if (waveNumber > 20) {
		LK.showYouWin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -1028,9 +1028,9 @@
 	infantry: 50,
 	sword: 90,
 	sniper: 150
 };
-var isHardMode = false;
+var isHardMode = true;
 // Create unit upgrade popup
 var unitUpgradePopup = game.addChild(new UnitUpgradePopup());
 // Initialize upgrade system
 var upgrades = {
@@ -1164,18 +1164,18 @@
 sniperButtonBg.tint = 0x800080;
 LK.gui.bottom.addChild(sniperButtonBg);
 sniperButtonBg.x = 550;
 sniperButtonBg.y = -20;
-sniperButtonBg.visible = false;
+sniperButtonBg.visible = isHardMode;
 var sniperButton = new Text2('SNIPER (150)', {
 	size: 35,
 	fill: 0xFFFFFF
 });
 sniperButton.anchor.set(0.5, 1);
 LK.gui.bottom.addChild(sniperButton);
 sniperButton.x = 550;
 sniperButton.y = -80;
-sniperButton.visible = false;
+sniperButton.visible = isHardMode;
 // Create upgrade buttons
 var damageUpgradeButton = new Text2('DMG LV' + upgrades.damage + ' (' + upgradeBaseCost * upgrades.damage + ')', {
 	size: 50,
 	fill: 0xFFFFFF
@@ -1294,11 +1294,11 @@
 LK.gui.center.addChild(hardModePopupBg);
 hardModePopupBg.x = 0;
 hardModePopupBg.y = 0;
 hardModePopupBg.visible = false;
-var hardModeButton = new Text2('OPEN HARD MODE', {
+var hardModeButton = new Text2('HARD MODE ACTIVE', {
 	size: 60,
-	fill: 0xFF4500
+	fill: 0x00FF00
 });
 hardModeButton.anchor.set(0.5, 0.5);
 LK.gui.center.addChild(hardModeButton);
 hardModeButton.x = 0;