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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 1;
	self.shootTimer = 0;
	self.shootInterval = 120; // 2 seconds at 60fps
	self.update = function () {
		// Move toward player
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			var moveX = dx / distance * self.speed * timeScale;
			var moveY = dy / distance * self.speed * timeScale;
			var newX = self.x + moveX;
			var newY = self.y + moveY;
			// Check collision with obstacles
			var canMove = true;
			for (var i = 0; i < obstacles.length; i++) {
				var obstacle = obstacles[i];
				if (newX + 30 > obstacle.x - 60 && newX - 30 < obstacle.x + 60 && newY + 30 > obstacle.y - 60 && newY - 30 < obstacle.y + 60) {
					canMove = false;
					break;
				}
			}
			if (canMove) {
				self.x = newX;
				self.y = newY;
			}
		}
		// Shoot at player
		self.shootTimer += timeScale;
		if (self.shootTimer >= self.shootInterval) {
			self.shoot();
			self.shootTimer = 0;
		}
	};
	self.shoot = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		enemyBullets.push(bullet);
		game.addChild(bullet);
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			LK.effects.flashObject(self, 0xFFFFFF, 200);
			LK.getSound('enemyHit').play();
			return true; // Enemy destroyed
		}
		return false;
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed * timeScale;
	};
	return self;
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 100;
	self.health = self.maxHealth;
	self.shootTimer = 0;
	self.shootInterval = 15; // Fast shooting
	self.update = function () {
		// Always shoot when enemies exist
		if (enemies.length > 0) {
			self.shootTimer += timeScale;
			if (self.shootTimer >= self.shootInterval) {
				self.shoot();
				self.shootTimer = 0;
			}
		}
	};
	self.shoot = function () {
		var bullet = new HeroBullet();
		bullet.x = self.x;
		bullet.y = self.y - 40;
		heroBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xFF0000, 500);
		LK.getSound('playerHit').play();
		// Use extra health if health drops to 20 or below and we have uses available
		if (self.health <= 20 && extraHealthUses > 0) {
			self.health += 50;
			if (self.health > self.maxHealth) {
				self.health = self.maxHealth;
			}
			extraHealthUses--;
			updateExtraHealthDisplay();
			LK.effects.flashObject(self, 0x00FF00, 800); // Green flash for healing
		}
		updateHealthBar();
		if (self.health <= 0) {
			LK.showGameOver();
		}
	};
	return self;
});
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12;
	self.damage = 1;
	self.update = function () {
		self.y -= self.speed * timeScale;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var enemies = [];
var enemyBullets = [];
var heroBullets = [];
var obstacles = [];
var timeScale = 1.0;
var isBulletTimeActive = false;
var bulletTimeEnergy = 100;
var maxBulletTimeEnergy = 100;
var bulletTimeDecayRate = 0.5;
var bulletTimeRechargeRate = 0.1;
var bulletTimeSlowFactor = 0.2;
var dragNode = null;
var enemySpawnTimer = 0;
var enemySpawnInterval = 180; // 3 seconds
var waveNumber = 1;
var enemiesPerWave = 3;
var extraHealthUses = 3;
var maxExtraHealthUses = 3;
// UI elements
var scoreTxt = new Text2('0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 50;
var healthBarBg = LK.getAsset('healthBarBg', {
	anchorX: 0,
	anchorY: 0
});
var healthBar = LK.getAsset('healthBar', {
	anchorX: 0,
	anchorY: 0
});
var bulletTimeBarBg = LK.getAsset('bulletTimeBarBg', {
	anchorX: 0,
	anchorY: 0
});
var bulletTimeBar = LK.getAsset('bulletTimeBar', {
	anchorX: 0,
	anchorY: 0
});
LK.gui.topright.addChild(healthBarBg);
LK.gui.toprightaddChild(healthBar);
LK.gui.topright.addChild(bulletTimeBarBg);
LK.gui.topright.addChild(bulletTimeBar);
healthBarBg.x = 120;
healthBarBg.y = 20;
healthBar.x = 122;
healthBar.y = 22;
bulletTimeBarBg.x = 120;
bulletTimeBarBg.y = 60;
bulletTimeBar.x = 122;
bulletTimeBar.y = 62;
// Add extra health display
var extraHealthText = new Text2('Extra Health: 3', {
	size: 40,
	fill: 0x00FF00
});
extraHealthText.anchor.set(0, 0);
LK.gui.topLeft.addChild(extraHealthText);
extraHealthText.x = 120;
extraHealthText.y = 100;
// Add extra health icons
var extraHealthIcons = [];
for (var i = 0; i < maxExtraHealthUses; i++) {
	var icon = LK.getAsset('extraHealthIcon', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	LK.gui.topLeft.addChild(icon);
	icon.x = 150 + i * 40;
	icon.y = 150;
	extraHealthIcons.push(icon);
}
// Add city background
var cityBg = LK.getAsset('cityBackground', {
	anchorX: 0,
	anchorY: 0
});
game.addChild(cityBg);
// Initialize hero
hero = game.addChild(new Hero());
hero.x = 1024;
hero.y = 2200;
// Create obstacles
for (var i = 0; i < 6; i++) {
	var obstacle = new Obstacle();
	obstacle.x = 400 + i % 3 * 600;
	obstacle.y = 800 + Math.floor(i / 3) * 600;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Update score display
function updateScore() {
	scoreTxt.setText(LK.getScore());
}
// Update health bar
function updateHealthBar() {
	var healthPercent = hero.health / hero.maxHealth;
	healthBar.width = 400 * healthPercent;
}
// Update bullet time bar
function updateBulletTimeBar() {
	var energyPercent = bulletTimeEnergy / maxBulletTimeEnergy;
	bulletTimeBar.width = 300 * energyPercent;
}
// Update extra health display
function updateExtraHealthDisplay() {
	extraHealthText.setText('Extra Health: ' + extraHealthUses);
	for (var i = 0; i < extraHealthIcons.length; i++) {
		extraHealthIcons[i].alpha = i < extraHealthUses ? 1.0 : 0.3;
	}
}
// Spawn enemy
function spawnEnemy() {
	var enemy = new Enemy();
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			enemy.x = Math.random() * 2048;
			enemy.y = -50;
			break;
		case 1:
			// Right
			enemy.x = 2098;
			enemy.y = Math.random() * 1000 + 100;
			break;
		case 2:
			// Bottom
			enemy.x = Math.random() * 2048;
			enemy.y = -50;
			break;
		case 3:
			// Left
			enemy.x = -50;
			enemy.y = Math.random() * 1000 + 100;
			break;
	}
	// Scale enemy stats with wave number
	enemy.speed = 2 + waveNumber * 0.3;
	enemy.shootInterval = Math.max(60, 120 - waveNumber * 5);
	enemies.push(enemy);
	game.addChild(enemy);
}
// Handle bullet time activation
function activateBulletTime() {
	if (bulletTimeEnergy > 0) {
		isBulletTimeActive = true;
		timeScale = bulletTimeSlowFactor;
	}
}
// Handle bullet time deactivation
function deactivateBulletTime() {
	isBulletTimeActive = false;
	timeScale = 1.0;
}
// Event handlers
function handleMove(x, y, obj) {
	if (dragNode) {
		var newX = x;
		var newY = y;
		// Keep hero within bounds
		newX = Math.max(40, Math.min(2008, newX));
		newY = Math.max(40, Math.min(2692, newY));
		// Check collision with obstacles
		var canMove = true;
		for (var i = 0; i < obstacles.length; i++) {
			var obstacle = obstacles[i];
			var tempHero = {
				x: newX,
				y: newY,
				width: 80,
				height: 80
			};
			if (newX + 40 > obstacle.x - 60 && newX - 40 < obstacle.x + 60 && newY + 40 > obstacle.y - 60 && newY - 40 < obstacle.y + 60) {
				canMove = false;
				break;
			}
		}
		if (canMove) {
			dragNode.x = newX;
			dragNode.y = newY;
		}
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = hero;
	activateBulletTime();
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
	deactivateBulletTime();
};
// Main game update loop
game.update = function () {
	// Update bullet time energy
	if (isBulletTimeActive) {
		bulletTimeEnergy -= bulletTimeDecayRate;
		if (bulletTimeEnergy <= 0) {
			bulletTimeEnergy = 0;
			deactivateBulletTime();
		}
	} else {
		bulletTimeEnergy += bulletTimeRechargeRate;
		if (bulletTimeEnergy > maxBulletTimeEnergy) {
			bulletTimeEnergy = maxBulletTimeEnergy;
		}
	}
	updateBulletTimeBar();
	// Spawn enemies
	enemySpawnTimer += timeScale;
	if (enemySpawnTimer >= enemySpawnInterval) {
		if (enemies.length < enemiesPerWave) {
			spawnEnemy();
		}
		enemySpawnTimer = 0;
		// Start new wave if no enemies left
		if (enemies.length === 0) {
			waveNumber++;
			enemiesPerWave = Math.min(8, 3 + Math.floor(waveNumber / 2));
			enemySpawnInterval = Math.max(60, 180 - waveNumber * 10);
		}
	}
	// Update hero bullets
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		var bullet = heroBullets[i];
		if (bullet.lastY === undefined) {
			bullet.lastY = bullet.y;
		}
		// Remove bullets that go off screen
		if (bullet.lastY >= -20 && bullet.y < -20) {
			bullet.destroy();
			heroBullets.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 (bullet.intersects(enemy)) {
				if (enemy.takeDamage(bullet.damage)) {
					// Enemy destroyed
					enemy.destroy();
					enemies.splice(j, 1);
					LK.setScore(LK.getScore() + 10);
					updateScore();
					// Refuel bullet time on enemy kill
					bulletTimeEnergy += 20;
					if (bulletTimeEnergy > maxBulletTimeEnergy) {
						bulletTimeEnergy = maxBulletTimeEnergy;
					}
				}
				bullet.destroy();
				heroBullets.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			// Check collision with obstacles
			for (var j = obstacles.length - 1; j >= 0; j--) {
				var obstacle = obstacles[j];
				if (bullet.intersects(obstacle)) {
					bullet.destroy();
					heroBullets.splice(i, 1);
					hitEnemy = true;
					break;
				}
			}
		}
		if (!hitEnemy) {
			bullet.lastY = bullet.y;
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY === undefined) {
			bullet.lastY = bullet.y;
		}
		// Remove bullets that go off screen
		if (bullet.lastY <= 2752 && bullet.y > 2752) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with hero
		if (bullet.intersects(hero)) {
			hero.takeDamage(bullet.damage);
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with obstacles
		var hitObstacle = false;
		for (var j = obstacles.length - 1; j >= 0; j--) {
			var obstacle = obstacles[j];
			if (bullet.intersects(obstacle)) {
				bullet.destroy();
				enemyBullets.splice(i, 1);
				hitObstacle = true;
				break;
			}
		}
		if (!hitObstacle) {
			bullet.lastY = bullet.y;
		}
	}
	// Check enemy collision with hero
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.intersects(hero)) {
			hero.takeDamage(1);
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
};
// Initialize UI
updateScore();
updateHealthBar();
updateBulletTimeBar();
updateExtraHealthDisplay();

===================================================================
--- original.js
+++ change.js
@@ -201,12 +201,12 @@
 var bulletTimeBar = LK.getAsset('bulletTimeBar', {
 	anchorX: 0,
 	anchorY: 0
 });
-LK.gui.topLeft.addChild(healthBarBg);
-LK.gui.topLeft.addChild(healthBar);
-LK.gui.topLeft.addChild(bulletTimeBarBg);
-LK.gui.topLeft.addChild(bulletTimeBar);
+LK.gui.topright.addChild(healthBarBg);
+LK.gui.toprightaddChild(healthBar);
+LK.gui.topright.addChild(bulletTimeBarBg);
+LK.gui.topright.addChild(bulletTimeBar);
 healthBarBg.x = 120;
 healthBarBg.y = 20;
 healthBar.x = 122;
 healthBar.y = 22;