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

/**** 
* Classes
****/ 
var ArmedScientist = Container.expand(function () {
	var self = Container.call(this);
	var scientistGraphics = self.attachAsset('scientist', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	scientistGraphics.tint = 0xFF0000; // Red tint to distinguish armed scientists
	self.speed = 2.5;
	self.health = 7;
	self.points = 30;
	self.targetX = 0;
	self.targetY = 0;
	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 > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var Chest = Container.expand(function () {
	var self = Container.call(this);
	var chestGraphics = self.attachAsset('chest', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'chest';
	self.value = 20;
	self.update = function () {
		self.rotation += 0.03;
	};
	return self;
});
var DirectionalButton = Container.expand(function (direction) {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('dirButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.direction = direction;
	self.alpha = 0.7;
	// Create arrow text based on direction
	var arrowText = new Text2('', {
		size: 90,
		fill: 0xFFFFFF
	});
	arrowText.anchor.set(0.5, 0.5);
	switch (direction) {
		case 'up':
			arrowText.setText('↑');
			break;
		case 'down':
			arrowText.setText('↓');
			break;
		case 'left':
			arrowText.setText('←');
			break;
		case 'right':
			arrowText.setText('→');
			break;
	}
	self.addChild(arrowText);
	self.down = function (x, y, obj) {
		currentShootDirection = self.direction;
		self.alpha = 1.0;
		// Reset other buttons
		for (var i = 0; i < dirButtons.length; i++) {
			if (dirButtons[i] !== self) {
				dirButtons[i].alpha = 0.7;
			}
		}
		// Fire bullet immediately when button is pressed
		dog.shoot();
	};
	return self;
});
var Dog = Container.expand(function () {
	var self = Container.call(this);
	var dogGraphics = self.attachAsset('dog', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.maxHealth = 3;
	self.shootCooldown = 0;
	self.shootRate = 20;
	self.speed = 5;
	self.powerUpActive = false;
	self.powerUpEndTime = 0;
	self.weaponType = 'knife';
	self.weaponLevel = 1;
	self.gold = 0;
	self.update = function () {
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (self.powerUpActive && LK.now > self.powerUpEndTime) {
			self.powerUpActive = false;
			self.speed = 5;
			self.shootRate = 20;
		}
	};
	self.shoot = function () {
		if (self.shootCooldown <= 0) {
			var bullet = new DogBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.weaponType = self.weaponType;
			bullet.weaponLevel = self.weaponLevel;
			// Set direction based on current shoot direction
			switch (currentShootDirection) {
				case 'up':
					bullet.dirX = 0;
					bullet.dirY = -1;
					bullet.y -= 60;
					break;
				case 'down':
					bullet.dirX = 0;
					bullet.dirY = 1;
					bullet.y += 60;
					break;
				case 'left':
					bullet.dirX = -1;
					bullet.dirY = 0;
					bullet.x -= 60;
					break;
				case 'right':
					bullet.dirX = 1;
					bullet.dirY = 0;
					bullet.x += 60;
					break;
			}
			bullets.push(bullet);
			game.addChild(bullet);
			self.shootCooldown = self.shootRate;
			LK.getSound('shoot').play();
		}
	};
	self.takeDamage = function () {
		self.health--;
		LK.effects.flashObject(self, 0xFF0000, 500);
		if (self.health <= 0) {
			LK.showGameOver();
		}
	};
	self.activatePowerUp = function () {
		self.powerUpActive = true;
		self.powerUpEndTime = LK.now + 5000;
		self.speed = 8;
		self.shootRate = 11;
	};
	self.upgradeWeapon = function () {
		if (self.weaponLevel < 3) {
			self.weaponLevel++;
			if (self.weaponLevel === 2 && scientistResidues >= 1000) {
				self.weaponType = 'laser';
				self.shootRate = 13;
			} else if (self.weaponLevel === 3) {
				self.shootRate = 7;
			}
		}
	};
	return self;
});
var DogBullet = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 8;
	self.damage = 1;
	self.dirX = 0;
	self.dirY = -1;
	self.weaponType = 'knife';
	self.weaponLevel = 1;
	var bulletGraphics;
	self.update = function () {
		// Update graphics based on weapon type if not set
		if (!bulletGraphics) {
			if (self.weaponType === 'laser') {
				bulletGraphics = self.attachAsset('laser', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				self.damage = 2;
			} else {
				bulletGraphics = self.attachAsset('knife', {
					anchorX: 0.5,
					anchorY: 0.5
				});
			}
			// Set rotation based on direction
			if (self.dirX === 1) bulletGraphics.rotation = Math.PI / 2;else if (self.dirX === -1) bulletGraphics.rotation = -Math.PI / 2;else if (self.dirY === 1) bulletGraphics.rotation = Math.PI;
		}
		self.x += self.dirX * self.speed;
		self.y += self.dirY * self.speed;
	};
	return self;
});
var FastScientist = Container.expand(function () {
	var self = Container.call(this);
	var scientistGraphics = self.attachAsset('fastScientist', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 7.0;
	self.health = 10;
	self.points = 20;
	self.targetX = 0;
	self.targetY = 0;
	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 > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var Gold = Container.expand(function () {
	var self = Container.call(this);
	var goldGraphics = self.attachAsset('gold', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'gold';
	self.value = 10;
	self.update = function () {
		self.rotation += 0.06;
	};
	return self;
});
var Metal = Container.expand(function () {
	var self = Container.call(this);
	var metalGraphics = self.attachAsset('metal', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'metal';
	self.value = 5;
	self.update = function () {
		self.rotation += 0.05;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'speed';
	self.duration = 5000;
	self.update = function () {
		self.rotation += 0.1;
	};
	return self;
});
var Scientist = Container.expand(function () {
	var self = Container.call(this);
	var scientistGraphics = self.attachAsset('scientist', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 5;
	self.points = 10;
	self.targetX = 0;
	self.targetY = 0;
	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 > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var Technology = Container.expand(function () {
	var self = Container.call(this);
	var technologyGraphics = self.attachAsset('technology', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'technology';
	self.value = 50;
	self.update = function () {
		self.rotation += 0.08;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var dog = new Dog();
var bullets = [];
var scientists = [];
var powerUps = [];
var metals = [];
var chests = [];
var technologies = [];
var golds = [];
var dirButtons = [];
var currentShootDirection = 'up';
var spawnTimer = 0;
var waveTimer = 0;
var difficultyLevel = 1;
var lastSpawnRate = 120;
var scientistResidues = 0;
var scientistCount = 0;
dog.x = 1024;
dog.y = 2200;
game.addChild(dog);
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var healthTxt = new Text2('Health: 3', {
	size: 60,
	fill: 0xFF0000
});
healthTxt.anchor.set(0, 0);
healthTxt.x = 150;
healthTxt.y = 50;
LK.gui.topLeft.addChild(healthTxt);
var goldTxt = new Text2('Gold: 0', {
	size: 60,
	fill: 0xFFD700
});
goldTxt.anchor.set(0, 0);
goldTxt.x = 150;
goldTxt.y = 120;
LK.gui.topLeft.addChild(goldTxt);
var weaponTxt = new Text2('Weapon: Knife Lv.1', {
	size: 50,
	fill: 0xFFFFFF
});
weaponTxt.anchor.set(0, 0);
weaponTxt.x = 150;
weaponTxt.y = 190;
LK.gui.topLeft.addChild(weaponTxt);
var residueTxt = new Text2('Residues: 0/1000', {
	size: 50,
	fill: 0x00FF00
});
residueTxt.anchor.set(0, 0);
residueTxt.x = 150;
residueTxt.y = 250;
LK.gui.topLeft.addChild(residueTxt);
// Create directional buttons in main game area with proper spacing
var upBtn = new DirectionalButton('up');
upBtn.x = 300;
upBtn.y = 2350;
game.addChild(upBtn);
dirButtons.push(upBtn);
var downBtn = new DirectionalButton('down');
downBtn.x = 300;
downBtn.y = 2650;
game.addChild(downBtn);
dirButtons.push(downBtn);
var leftBtn = new DirectionalButton('left');
leftBtn.x = 150;
leftBtn.y = 2500;
game.addChild(leftBtn);
dirButtons.push(leftBtn);
var rightBtn = new DirectionalButton('right');
rightBtn.x = 450;
rightBtn.y = 2500;
game.addChild(rightBtn);
dirButtons.push(rightBtn);
// Set initial button state
upBtn.alpha = 1.0;
var dragNode = null;
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
}
function updateHealth() {
	healthTxt.setText('Health: ' + dog.health);
}
function updateGold() {
	goldTxt.setText('Gold: ' + dog.gold);
}
function updateWeapon() {
	var weaponName = dog.weaponType === 'knife' ? 'Knife' : 'Laser';
	weaponTxt.setText('Weapon: ' + weaponName + ' Lv.' + dog.weaponLevel);
}
function updateResidue() {
	residueTxt.setText('Residues: ' + scientistResidues + '/1000');
}
function spawnScientist() {
	var scientist;
	scientistCount++;
	if (scientistCount % 10 === 0) {
		scientist = new FastScientist();
	} else if (scientistCount % 15 === 0) {
		scientist = new ArmedScientist();
	} else {
		scientist = new Scientist();
	}
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			scientist.x = Math.random() * 2048;
			scientist.y = -40;
			break;
		case 1:
			// Right
			scientist.x = 2088;
			scientist.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			scientist.x = Math.random() * 2048;
			scientist.y = 2772;
			break;
		case 3:
			// Left
			scientist.x = -40;
			scientist.y = Math.random() * 2732;
			break;
	}
	scientist.targetX = dog.x;
	scientist.targetY = dog.y;
	scientists.push(scientist);
	game.addChild(scientist);
}
function spawnPowerUp() {
	if (Math.random() < 0.02 && powerUps.length < 2) {
		var powerUp = new PowerUp();
		powerUp.x = Math.random() * 1800 + 124;
		powerUp.y = Math.random() * 2400 + 166;
		powerUps.push(powerUp);
		game.addChild(powerUp);
	}
}
function spawnLoot(x, y) {
	var lootChance = Math.random();
	var loot;
	if (lootChance < 0.5) {
		// 50% chance for metal
		loot = new Metal();
		metals.push(loot);
	} else if (lootChance < 0.8) {
		// 30% chance for chest
		loot = new Chest();
		chests.push(loot);
	} else {
		// 20% chance for technology
		loot = new Technology();
		technologies.push(loot);
	}
	loot.x = x;
	loot.y = y;
	game.addChild(loot);
}
function spawnGoldFromChest(x, y) {
	// Spawn 2-3 gold pieces from chest
	var goldCount = Math.floor(Math.random() * 2) + 2;
	for (var i = 0; i < goldCount; i++) {
		var gold = new Gold();
		gold.x = x + (Math.random() - 0.5) * 60;
		gold.y = y + (Math.random() - 0.5) * 60;
		golds.push(gold);
		game.addChild(gold);
	}
}
function handleMove(x, y, obj) {
	if (dragNode) {
		dragNode.x = Math.max(60, Math.min(1988, x));
		dragNode.y = Math.max(60, Math.min(2672, y));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = dog;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	spawnTimer++;
	waveTimer++;
	if (waveTimer % 1800 === 0) {
		difficultyLevel++;
		lastSpawnRate = Math.max(30, lastSpawnRate - 10);
	}
	if (spawnTimer >= lastSpawnRate) {
		spawnScientist();
		spawnTimer = 0;
	}
	spawnPowerUp();
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.y < -50 || bullet.y > 2782 || bullet.x < -50 || bullet.x > 2098) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		for (var j = scientists.length - 1; j >= 0; j--) {
			var scientist = scientists[j];
			if (bullet.intersects(scientist)) {
				if (scientist.takeDamage(bullet.damage)) {
					LK.setScore(LK.getScore() + scientist.points);
					updateScore();
					spawnLoot(scientist.x, scientist.y);
					scientistResidues++;
					updateResidue();
					scientist.destroy();
					scientists.splice(j, 1);
					LK.getSound('hit').play();
				}
				bullet.destroy();
				bullets.splice(i, 1);
				break;
			}
		}
	}
	for (var k = scientists.length - 1; k >= 0; k--) {
		var scientist = scientists[k];
		scientist.targetX = dog.x;
		scientist.targetY = dog.y;
		if (scientist.intersects(dog)) {
			scientist.destroy();
			scientists.splice(k, 1);
			continue;
		}
		var distanceToEdge = Math.min(scientist.x, 2048 - scientist.x, scientist.y, 2732 - scientist.y);
		if (distanceToEdge < -100) {
			scientist.destroy();
			scientists.splice(k, 1);
		}
	}
	for (var l = powerUps.length - 1; l >= 0; l--) {
		var powerUp = powerUps[l];
		if (powerUp.intersects(dog)) {
			dog.activatePowerUp();
			LK.getSound('powerup').play();
			powerUp.destroy();
			powerUps.splice(l, 1);
		}
	}
	// Check metal collection
	for (var m = metals.length - 1; m >= 0; m--) {
		var metal = metals[m];
		if (metal.intersects(dog)) {
			LK.setScore(LK.getScore() + metal.value);
			updateScore();
			metal.destroy();
			metals.splice(m, 1);
		}
	}
	// Check chest collection
	for (var c = chests.length - 1; c >= 0; c--) {
		var chest = chests[c];
		if (chest.intersects(dog)) {
			LK.setScore(LK.getScore() + chest.value);
			updateScore();
			// Spawn gold from chest
			spawnGoldFromChest(chest.x, chest.y);
			// Random chance for weapon upgrade
			if (Math.random() < 0.3) {
				dog.upgradeWeapon();
				updateWeapon();
			}
			chest.destroy();
			chests.splice(c, 1);
		}
	}
	// Check technology collection
	for (var t = technologies.length - 1; t >= 0; t--) {
		var technology = technologies[t];
		if (technology.intersects(dog)) {
			LK.setScore(LK.getScore() + technology.value);
			updateScore();
			technology.destroy();
			technologies.splice(t, 1);
		}
	}
	// Check gold collection
	for (var g = golds.length - 1; g >= 0; g--) {
		var gold = golds[g];
		if (gold.intersects(dog)) {
			dog.gold += gold.value;
			updateGold();
			gold.destroy();
			golds.splice(g, 1);
		}
	}
	if (LK.ticks % 10 === 0 && dog.powerUpActive) {
		dog.shoot();
	}
};
LK.playMusic('bgmusic');

===================================================================
--- original.js
+++ change.js
@@ -348,11 +348,8 @@
 var difficultyLevel = 1;
 var lastSpawnRate = 120;
 var scientistResidues = 0;
 var scientistCount = 0;
-var normalScientistDamage = 0;
-var fastScientistDamage = 0;
-var armedScientistDamage = 0;
 dog.x = 1024;
 dog.y = 2200;
 game.addChild(dog);
 var scoreTxt = new Text2('Score: 0', {
@@ -567,20 +564,8 @@
 		var scientist = scientists[k];
 		scientist.targetX = dog.x;
 		scientist.targetY = dog.y;
 		if (scientist.intersects(dog)) {
-			// Track damage by scientist type
-			if (scientist.constructor === FastScientist) {
-				fastScientistDamage++;
-			} else if (scientist.constructor === ArmedScientist) {
-				armedScientistDamage++;
-			} else {
-				normalScientistDamage++;
-			}
-			// Check death conditions
-			if (normalScientistDamage >= 5 || fastScientistDamage >= 3 || armedScientistDamage >= 2) {
-				LK.showGameOver();
-			}
 			scientist.destroy();
 			scientists.splice(k, 1);
 			continue;
 		}