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

/**** 
* Classes
****/ 
var EnemyProjectile = Container.expand(function () {
	var self = Container.call(this);
	var projectileGraphics = self.attachAsset('enemyProjectile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.health = 3;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerLaser = Container.expand(function () {
	var self = Container.call(this);
	var laserGraphics = self.attachAsset('playerLaser', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -8;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.shootCooldown = 0;
	self.chargeAttackTime = 0;
	self.isCharging = false;
	self.update = function () {
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (self.isCharging) {
			self.chargeAttackTime++;
		}
	};
	self.shoot = function () {
		if (self.shootCooldown <= 0) {
			var laser = new PlayerLaser();
			laser.x = self.x;
			laser.y = self.y - 60;
			// Set damage based on charge time - double damage when charged
			if (self.chargeAttackTime >= 60) {
				// 1 second charge at 60fps - double damage
				laser.damage = 6;
			} else {
				laser.damage = 1;
			}
			game.addChild(laser);
			playerLasers.push(laser);
			self.shootCooldown = 10;
			LK.getSound('shoot').play();
		}
	};
	self.takeDamage = function () {
		self.health--;
		LK.getSound('playerHit').play();
		LK.effects.flashObject(self, 0xff0000, 500);
		if (self.health <= 0) {
			LK.showGameOver();
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var player = new PlayerShip();
player.x = 2048 / 2;
player.y = 2732 - 200;
game.addChild(player);
var enemies = [];
var playerLasers = [];
var enemyProjectiles = [];
var spawnTimer = 0;
var gameSpeed = 1;
var playerShootCooldown = 0;
var isFireButtonPressed = false;
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: 0xFF4444
});
healthTxt.anchor.set(0, 0);
healthTxt.x = 150;
healthTxt.y = 50;
LK.gui.topLeft.addChild(healthTxt);
var fireButton = new Text2('FIRE', {
	size: 120,
	fill: 0x00FF00
});
fireButton.anchor.set(1, 0);
LK.gui.topRight.addChild(fireButton);
var dragNode = null;
fireButton.down = function (x, y, obj) {
	isFireButtonPressed = true;
	player.isCharging = true;
	player.chargeAttackTime = 0;
	if (playerShootCooldown <= 0) {
		player.shoot();
		playerShootCooldown = 20;
	}
};
fireButton.up = function (x, y, obj) {
	isFireButtonPressed = false;
	player.isCharging = false;
	player.chargeAttackTime = 0;
};
game.down = function (x, y, obj) {
	dragNode = player;
	player.isCharging = true;
	player.chargeAttackTime = 0;
	if (playerShootCooldown <= 0) {
		player.shoot();
		playerShootCooldown = 20;
	}
};
game.move = function (x, y, obj) {
	if (dragNode) {
		dragNode.x = Math.max(100, Math.min(1948, x));
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
	player.isCharging = false;
	player.chargeAttackTime = 0;
};
game.update = function () {
	// Update cooldown
	if (playerShootCooldown > 0) {
		playerShootCooldown--;
	}
	// Update UI
	scoreTxt.setText('Score: ' + LK.getScore());
	healthTxt.setText('Health: ' + player.health);
	// Spawn enemies
	spawnTimer++;
	var spawnRate = Math.max(120 - Math.floor(LK.getScore() / 10) * 10, 60);
	if (spawnTimer >= spawnRate) {
		var enemy = new EnemyShip();
		enemy.x = Math.random() * 1848 + 100;
		enemy.y = -50;
		enemy.speed = 6 + Math.floor(LK.getScore() / 15) * 1.5;
		enemies.push(enemy);
		game.addChild(enemy);
		spawnTimer = 0;
	}
	// Update and check player lasers
	for (var i = playerLasers.length - 1; i >= 0; i--) {
		var laser = playerLasers[i];
		if (laser.lastY === undefined) laser.lastY = laser.y;
		// Remove lasers that go off screen
		if (laser.lastY >= -50 && laser.y < -50) {
			laser.destroy();
			playerLasers.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (laser.intersects(enemy)) {
				enemy.health -= laser.damage;
				laser.destroy();
				playerLasers.splice(i, 1);
				hitEnemy = true;
				if (enemy.health <= 0) {
					LK.setScore(LK.getScore() + 10);
					LK.getSound('enemyDestroy').play();
					enemy.destroy();
					enemies.splice(j, 1);
				}
				break;
			}
		}
		if (!hitEnemy) {
			laser.lastY = laser.y;
		}
	}
	// Update and check enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove enemies that reach bottom
		if (enemy.lastY <= 2732 && enemy.y > 2732) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (enemy.intersects(player)) {
			enemy.destroy();
			enemies.splice(i, 1);
			player.takeDamage();
			continue;
		}
		enemy.lastY = enemy.y;
	}
	// Update and check enemy projectiles
	for (var i = enemyProjectiles.length - 1; i >= 0; i--) {
		var projectile = enemyProjectiles[i];
		if (projectile.lastY === undefined) projectile.lastY = projectile.y;
		// Remove projectiles that go off screen
		if (projectile.lastY <= 2732 && projectile.y > 2732) {
			projectile.destroy();
			enemyProjectiles.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (projectile.intersects(player)) {
			projectile.destroy();
			enemyProjectiles.splice(i, 1);
			player.takeDamage();
			continue;
		}
		projectile.lastY = projectile.y;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -66,12 +66,12 @@
 		if (self.shootCooldown <= 0) {
 			var laser = new PlayerLaser();
 			laser.x = self.x;
 			laser.y = self.y - 60;
-			// Set damage based on charge time
+			// Set damage based on charge time - double damage when charged
 			if (self.chargeAttackTime >= 60) {
-				// 1 second charge at 60fps
-				laser.damage = 3;
+				// 1 second charge at 60fps - double damage
+				laser.damage = 6;
 			} else {
 				laser.damage = 1;
 			}
 			game.addChild(laser);