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

/**** 
* Classes
****/ 
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;
	};
	return self;
});
var EnemyJet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('enemyJet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 1;
	self.speed = 2;
	self.fireRate = 120;
	self.fireTimer = Math.random() * 60;
	self.canFireMissiles = false;
	self.missileRate = 300;
	self.missileTimer = Math.random() * 150;
	self.horizontalSpeed = (Math.random() - 0.5) * 3;
	self.horizontalDirection = Math.random() > 0.5 ? 1 : -1;
	self.update = function () {
		self.y += self.speed;
		// Add horizontal movement
		self.x += self.horizontalSpeed * self.horizontalDirection;
		// Bounce off screen edges
		if (self.x < 100 || self.x > 1948) {
			self.horizontalDirection *= -1;
		}
		if (self.fireTimer > 0) {
			self.fireTimer--;
		}
		if (self.missileTimer > 0) {
			self.missileTimer--;
		}
		// Fire bullets
		if (self.fireTimer <= 0 && self.y > 0 && self.y < 2400) {
			self.fireBullet();
			self.fireTimer = self.fireRate + Math.random() * 60;
		}
		// Fire missiles (if capable)
		if (self.canFireMissiles && self.missileTimer <= 0 && self.y > 0 && self.y < 2400) {
			self.fireMissile();
			self.missileTimer = self.missileRate + Math.random() * 120;
		}
	};
	self.fireBullet = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + 50;
		enemyBullets.push(bullet);
		game.addChild(bullet);
	};
	self.fireMissile = function () {
		var missile = new Missile();
		missile.x = self.x;
		missile.y = self.y + 50;
		missiles.push(missile);
		game.addChild(missile);
		LK.getSound('missile').play();
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			// Create explosion effect
			var explosion = LK.getAsset('explosion', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: self.x,
				y: self.y
			});
			game.addChild(explosion);
			// Fade out explosion
			tween(explosion, {
				alpha: 0
			}, {
				duration: 500,
				onFinish: function onFinish() {
					explosion.destroy();
				}
			});
			self.destroy();
			LK.getSound('explosion').play();
			return true;
		}
		return false;
	};
	return self;
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('missile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.damage = 2;
	self.trackingSpeed = 0.5;
	self.update = function () {
		// Basic homing behavior
		if (player) {
			var dx = player.x - self.x;
			var dy = player.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 0) {
				self.x += dx / distance * self.trackingSpeed;
				self.y += dy / distance * self.trackingSpeed;
			}
		}
		self.y += self.speed;
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerJet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('playerJet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 3;
	self.health = 3;
	self.speed = 8;
	self.fireRate = 15;
	self.fireTimer = 0;
	self.invulnerable = false;
	self.invulnerableTimer = 0;
	self.update = function () {
		if (self.fireTimer > 0) {
			self.fireTimer--;
		}
		if (self.invulnerable) {
			self.invulnerableTimer--;
			if (self.invulnerableTimer <= 0) {
				self.invulnerable = false;
				graphics.alpha = 1;
			} else {
				graphics.alpha = 0.5;
			}
		}
		// Auto-fire
		if (self.fireTimer <= 0) {
			self.fire();
			self.fireTimer = self.fireRate;
		}
	};
	self.fire = function () {
		var bullet = new PlayerBullet();
		bullet.x = self.x;
		bullet.y = self.y - 50;
		playerBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (damage) {
		if (self.invulnerable) return;
		self.health -= damage;
		self.invulnerable = true;
		self.invulnerableTimer = 60;
		LK.effects.flashObject(self, 0xFF0000, 500);
		if (self.health <= 0) {
			gameOver();
		}
		updateHealthDisplay();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x001122
});

/**** 
* Game Code
****/ 
// Background setup
var background1 = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
var background2 = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: -2732
});
game.addChild(background1);
game.addChild(background2);
// Game state variables
var currentWave = 1;
var maxWaves = 20;
var waveEnemies = [];
var enemiesSpawned = 0;
var enemiesToSpawn = 5;
var spawnTimer = 0;
var spawnRate = 60;
var waveComplete = false;
var gameState = 'playing'; // 'playing', 'upgrading', 'gameover'
// Game objects
var player = null;
var playerBullets = [];
var enemyBullets = [];
var missiles = [];
var enemies = [];
// UI elements
var waveText = null;
var healthText = null;
var upgradeContainer = null;
// Initialize player
player = new PlayerJet();
player.x = 1024;
player.y = 2300;
game.addChild(player);
// Initialize UI
waveText = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveText.anchor.set(0.5, 0);
LK.gui.top.addChild(waveText);
waveText.y = 50;
healthText = new Text2('Health: 3', {
	size: 50,
	fill: 0xFF4444
});
healthText.anchor.set(0, 0);
LK.gui.topRight.addChild(healthText);
healthText.x = -200;
healthText.y = 50;
function updateHealthDisplay() {
	healthText.setText('Health: ' + player.health);
}
function updateWaveDisplay() {
	waveText.setText('Wave: ' + currentWave);
}
function spawnEnemy() {
	var enemy = new EnemyJet();
	enemy.x = Math.random() * 1700 + 174;
	enemy.y = -90;
	// Scale difficulty based on wave
	enemy.health = Math.floor(currentWave / 5) + 1;
	enemy.speed = 2 + currentWave * 0.2;
	enemy.fireRate = Math.max(60 - currentWave * 2, 30);
	// Enable missiles for later waves
	if (currentWave >= 5) {
		enemy.canFireMissiles = true;
	}
	enemies.push(enemy);
	game.addChild(enemy);
	enemiesSpawned++;
}
function startWave() {
	currentWave++;
	if (currentWave > maxWaves) {
		LK.showYouWin();
		return;
	}
	enemiesToSpawn = 5 + Math.floor(currentWave * 1.5);
	enemiesSpawned = 0;
	spawnTimer = 0;
	waveComplete = false;
	gameState = 'playing';
	updateWaveDisplay();
	// Hide upgrade menu if visible
	if (upgradeContainer) {
		upgradeContainer.destroy();
		upgradeContainer = null;
	}
}
function completeWave() {
	if (currentWave >= maxWaves) {
		LK.showYouWin();
		return;
	}
	waveComplete = true;
	gameState = 'upgrading';
	showUpgradeMenu();
}
function showUpgradeMenu() {
	upgradeContainer = new Container();
	game.addChild(upgradeContainer);
	var titleText = new Text2('Choose Upgrade', {
		size: 80,
		fill: 0xFFFF00
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 1024;
	titleText.y = 800;
	upgradeContainer.addChild(titleText);
	var upgrades = [{
		text: 'Faster Firing',
		action: function action() {
			player.fireRate = Math.max(player.fireRate - 3, 5);
		}
	}, {
		text: 'More Health',
		action: function action() {
			player.maxHealth++;
			player.health = player.maxHealth;
		}
	}, {
		text: 'Faster Movement',
		action: function action() {
			player.speed += 2;
		}
	}, {
		text: 'Stronger Bullets',
		action: function action() {/* Implement bullet upgrade */}
	}];
	for (var i = 0; i < 3; i++) {
		var upgrade = upgrades[i];
		var button = new Container();
		var buttonBg = LK.getAsset('playerJet', {
			anchorX: 0.5,
			anchorY: 0.5,
			scaleX: 3,
			scaleY: 1.5
		});
		buttonBg.tint = 0x444444;
		button.addChild(buttonBg);
		var buttonText = new Text2(upgrade.text, {
			size: 40,
			fill: 0xFFFFFF
		});
		buttonText.anchor.set(0.5, 0.5);
		button.addChild(buttonText);
		button.x = 1024;
		button.y = 1200 + i * 200;
		button.upgrade = upgrade;
		button.down = function (x, y, obj) {
			this.upgrade.action();
			updateHealthDisplay();
			startWave();
		};
		upgradeContainer.addChild(button);
	}
}
function gameOver() {
	gameState = 'gameover';
	LK.showGameOver();
}
// Input handling
var dragActive = false;
game.down = function (x, y, obj) {
	if (gameState === 'playing') {
		dragActive = true;
		player.x = x;
		player.y = y;
	}
};
game.move = function (x, y, obj) {
	if (gameState === 'playing' && dragActive) {
		player.x = Math.max(70, Math.min(1978, x));
		player.y = Math.max(150, Math.min(2582, y));
	}
};
game.up = function (x, y, obj) {
	dragActive = false;
};
// Main game loop
game.update = function () {
	if (gameState !== 'playing') return;
	// Scroll background
	background1.y += 2;
	background2.y += 2;
	if (background1.y >= 2732) {
		background1.y = background2.y - 2732;
	}
	if (background2.y >= 2732) {
		background2.y = background1.y - 2732;
	}
	// Spawn enemies
	if (enemiesSpawned < enemiesToSpawn) {
		spawnTimer++;
		if (spawnTimer >= spawnRate) {
			spawnEnemy();
			spawnTimer = 0;
		}
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				if (enemy.takeDamage(bullet.damage)) {
					enemies.splice(j, 1);
				}
				bullet.destroy();
				playerBullets.splice(i, 1);
				break;
			}
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.y > 2782) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bullet.intersects(player)) {
			player.takeDamage(bullet.damage);
			bullet.destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Update missiles
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		if (missile.y > 2782 || missile.y < -50 || missile.x < -50 || missile.x > 2098) {
			missile.destroy();
			missiles.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (missile.intersects(player)) {
			player.takeDamage(missile.damage);
			missile.destroy();
			missiles.splice(i, 1);
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.y > 2782) {
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
	// Check wave completion
	if (enemiesSpawned >= enemiesToSpawn && enemies.length === 0 && !waveComplete) {
		completeWave();
	}
};
// Start first wave
updateWaveDisplay();
updateHealthDisplay();
LK.playMusic('bgmusic');

===================================================================
--- original.js
+++ change.js
@@ -31,10 +31,18 @@
 	self.fireTimer = Math.random() * 60;
 	self.canFireMissiles = false;
 	self.missileRate = 300;
 	self.missileTimer = Math.random() * 150;
+	self.horizontalSpeed = (Math.random() - 0.5) * 3;
+	self.horizontalDirection = Math.random() > 0.5 ? 1 : -1;
 	self.update = function () {
 		self.y += self.speed;
+		// Add horizontal movement
+		self.x += self.horizontalSpeed * self.horizontalDirection;
+		// Bounce off screen edges
+		if (self.x < 100 || self.x > 1948) {
+			self.horizontalDirection *= -1;
+		}
 		if (self.fireTimer > 0) {
 			self.fireTimer--;
 		}
 		if (self.missileTimer > 0) {
@@ -53,16 +61,16 @@
 	};
 	self.fireBullet = function () {
 		var bullet = new EnemyBullet();
 		bullet.x = self.x;
-		bullet.y = self.y + 30;
+		bullet.y = self.y + 50;
 		enemyBullets.push(bullet);
 		game.addChild(bullet);
 	};
 	self.fireMissile = function () {
 		var missile = new Missile();
 		missile.x = self.x;
-		missile.y = self.y + 30;
+		missile.y = self.y + 50;
 		missiles.push(missile);
 		game.addChild(missile);
 		LK.getSound('missile').play();
 	};
@@ -165,9 +173,9 @@
 	};
 	self.fire = function () {
 		var bullet = new PlayerBullet();
 		bullet.x = self.x;
-		bullet.y = self.y - 30;
+		bullet.y = self.y - 50;
 		playerBullets.push(bullet);
 		game.addChild(bullet);
 		LK.getSound('shoot').play();
 	};
@@ -232,9 +240,9 @@
 var upgradeContainer = null;
 // Initialize player
 player = new PlayerJet();
 player.x = 1024;
-player.y = 2400;
+player.y = 2300;
 game.addChild(player);
 // Initialize UI
 waveText = new Text2('Wave: 1', {
 	size: 60,
@@ -258,10 +266,10 @@
 	waveText.setText('Wave: ' + currentWave);
 }
 function spawnEnemy() {
 	var enemy = new EnemyJet();
-	enemy.x = Math.random() * 1800 + 124;
-	enemy.y = -50;
+	enemy.x = Math.random() * 1700 + 174;
+	enemy.y = -90;
 	// Scale difficulty based on wave
 	enemy.health = Math.floor(currentWave / 5) + 1;
 	enemy.speed = 2 + currentWave * 0.2;
 	enemy.fireRate = Math.max(60 - currentWave * 2, 30);
@@ -373,10 +381,10 @@
 	}
 };
 game.move = function (x, y, obj) {
 	if (gameState === 'playing' && dragActive) {
-		player.x = Math.max(40, Math.min(2008, x));
-		player.y = Math.max(100, Math.min(2632, y));
+		player.x = Math.max(70, Math.min(1978, x));
+		player.y = Math.max(150, Math.min(2582, y));
 	}
 };
 game.up = function (x, y, obj) {
 	dragActive = false;