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

/**** 
* Classes
****/ 
// Drone class
var Drone = Container.expand(function (player) {
	var self = Container.call(this);
	var droneSprite = self.attachAsset('drone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = droneSprite.width / 2;
	self.player = player;
	self.angle = 0;
	self.orbitRadius = 220;
	self.shootInterval = 30;
	self.lastShotTick = 0;
	self.update = function () {
		self.angle += 0.07;
		self.x = self.player.x + Math.cos(self.angle) * self.orbitRadius;
		self.y = self.player.y + Math.sin(self.angle) * self.orbitRadius;
	};
	return self;
});
// Drone bullet class
var DroneBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('drone_bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = bulletSprite.width / 2;
	self.speed = 14;
	self.damage = 1;
	self.dirX = 0;
	self.dirY = -1;
	self.update = function () {
		self.x += self.dirX * self.speed;
		self.y += self.dirY * self.speed;
	};
	return self;
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	self.type = 'normal'; // 'normal', 'fast', 'tank'
	self.speed = 6;
	self.health = 2;
	self.radius = 50;
	self.reward = 1;
	self.target = null;
	self.init = function (type) {
		self.type = type;
		if (type === 'normal') {
			self.attachAsset('enemy_normal', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.speed = 3 + Math.random() * 1; // normal enemy slower
			self.health = 2;
			self.radius = 50;
			self.reward = 1;
		} else if (type === 'fast') {
			self.attachAsset('enemy_fast', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.speed = 5.5 + Math.random() * 1; // fast enemy slower
			self.health = 1;
			self.radius = 40;
			self.reward = 2;
		} else if (type === 'tank') {
			self.attachAsset('enemy_tank', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.speed = 1.5 + Math.random() * 0.7; // tank enemy slower
			self.health = 6;
			self.radius = 80;
			self.reward = 4;
		}
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.getSound('enemy_hit').play();
		LK.effects.flashObject(self, 0xffffff, 200);
		if (self.health <= 0) {
			self.destroyed = true;
		}
	};
	self.update = function () {
		if (!self.target) return;
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			self.x += dx / dist * self.speed;
			self.y += dy / dist * self.speed;
		}
	};
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerSprite = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = playerSprite.width / 2;
	self.speed = 9;
	self.maxHealth = 8;
	self.health = self.maxHealth;
	self.shield = 0;
	self.dualShot = false;
	self.enhanced = false;
	self.hasDrone = false;
	self.drone = null;
	self.lastShotTick = 0;
	self.shootInterval = 18; // frames
	self.invulnTicks = 0;
	// For powerup timers
	self.dualShotTicks = 0;
	self.enhancedTicks = 0;
	self.shieldTicks = 0;
	// For touch drag
	self.isDragging = false;
	// Damage method
	self.takeDamage = function (amount) {
		if (self.invulnTicks > 0) return;
		if (self.shield > 0) {
			self.shield--;
			self.shieldTicks = 0;
			LK.effects.flashObject(self, 0x00e6e6, 400);
			return;
		}
		// On taking damage, clear all powerups except health and shield
		self.dualShot = false;
		self.dualShotTicks = 0;
		self.enhanced = false;
		self.enhancedTicks = 0;
		if (self.hasDrone && self.drone) {
			self.drone.destroy();
			self.drone = null;
		}
		self.hasDrone = false;
		self.health -= amount;
		self.invulnTicks = 30;
		LK.effects.flashObject(self, 0xff0000, 400);
		LK.getSound('player_hit').play();
		if (self.health <= 0) {
			LK.showGameOver();
		}
	};
	// Powerup methods
	self.applyPowerup = function (type) {
		if (type === 'shield') {
			self.shield = 1;
			self.shieldTicks = 600;
		} else if (type === 'health') {
			self.health = Math.min(self.maxHealth, self.health + 3);
		} else if (type === 'dual') {
			self.dualShot = true;
			self.dualShotTicks = 0; // not used anymore
		} else if (type === 'enhanced') {
			self.enhanced = true;
			self.enhancedTicks = 0; // not used anymore
		} else if (type === 'drone') {
			if (!self.hasDrone) {
				self.hasDrone = true;
				self.drone = new Drone(self);
				game.addChild(self.drone);
			}
		}
	};
	// Update powerup timers
	self.updatePowerups = function () {
		if (self.shield > 0) {
			self.shieldTicks--;
			if (self.shieldTicks <= 0) self.shield = 0;
		}
		// dualShot, enhanced, and drone are now cleared only on damage, not by timer
	};
	// Update method
	self.update = function () {
		if (self.invulnTicks > 0) self.invulnTicks--;
		self.updatePowerups();
		// Keep player inside bounds
		if (self.x < self.radius) self.x = self.radius;
		if (self.x > 2048 - self.radius) self.x = 2048 - self.radius;
		if (self.y < self.radius) self.y = self.radius;
		if (self.y > 2732 - self.radius) self.y = 2732 - self.radius;
	};
	return self;
});
// Player bullet class
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('player_bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = bulletSprite.width / 2;
	self.speed = 16;
	self.damage = 1;
	self.dirX = 0;
	self.dirY = -1;
	self.fromDrone = false;
	self.update = function () {
		self.x += self.dirX * self.speed;
		self.y += self.dirY * self.speed;
	};
	return self;
});
// Powerup class
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	self.type = 'shield';
	self.radius = 40;
	self.init = function (type) {
		self.type = type;
		if (type === 'shield') {
			self.attachAsset('powerup_shield', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else if (type === 'health') {
			self.attachAsset('powerup_health', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else if (type === 'dual') {
			self.attachAsset('powerup_dual', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else if (type === 'enhanced') {
			self.attachAsset('powerup_enhanced', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else if (type === 'drone') {
			self.attachAsset('powerup_drone', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	self.update = function () {
		// Float up and down
		self.y += Math.sin(LK.ticks / 20 + self._floatPhase) * 1.2;
	};
	self._floatPhase = Math.random() * Math.PI * 2;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181c24
});

/**** 
* Game Code
****/ 
// Add background shape to the game scene
var backgroundShape = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	width: 2048,
	height: 2732,
	color: 0x23283a // dark blueish background, adjust as desired
});
game.addChild(backgroundShape);
// Music
// Sounds
// Drone
// Powerups
// Bullets
// Enemy types
// Player
// Game state variables
var player;
var enemies = [];
var bullets = [];
var droneBullets = [];
var powerups = [];
var wave = 1;
var waveTicks = 0;
var spawnTick = 0;
var nextPowerupTick = 0;
var dragging = false;
var dragOffsetX = 0;
var dragOffsetY = 0;
var score = 0;
var healthBar;
var shieldBar;
var waveText;
var scoreText;
var lastTouchX = 0;
var lastTouchY = 0;
// GUI
function createGUI() {
	// Health bar
	healthBar = new Text2('', {
		size: 80,
		fill: 0xFF3A3A
	});
	healthBar.anchor.set(0, 0);
	LK.gui.top.addChild(healthBar);
	// Shield bar
	shieldBar = new Text2('', {
		size: 60,
		fill: 0x00E6E6
	});
	shieldBar.anchor.set(0, 0);
	LK.gui.top.addChild(shieldBar);
	// Score
	scoreText = new Text2('Score: 0', {
		size: 80,
		fill: "#fff"
	});
	scoreText.anchor.set(1, 0);
	LK.gui.topRight.addChild(scoreText);
	// Wave
	waveText = new Text2('Wave 1', {
		size: 70,
		fill: 0xFFE066
	});
	waveText.anchor.set(0.5, 0);
	LK.gui.top.addChild(waveText);
	// Position GUI
	healthBar.x = 120;
	healthBar.y = 20;
	shieldBar.x = 120;
	shieldBar.y = 110;
	scoreText.x = -40;
	scoreText.y = 20;
	waveText.x = 1024;
	waveText.y = 20;
}
function updateGUI() {
	var hearts = '';
	for (var i = 0; i < player.maxHealth; i++) {
		hearts += i < player.health ? '♥ ' : '♡ ';
	}
	healthBar.setText('HP: ' + hearts.trim());
	shieldBar.setText(player.shield > 0 ? 'Shield: ON' : '');
	scoreText.setText('Score: ' + score);
	waveText.setText('Wave ' + wave);
}
// Spawn player
function spawnPlayer() {
	player = new Player();
	player.x = 2048 / 2;
	player.y = 2732 * 0.7;
	game.addChild(player);
}
// Spawn enemies for current wave
function spawnEnemies() {
	var num = 4 + wave * 2;
	for (var i = 0; i < num; i++) {
		var type;
		if (wave >= 5 && Math.random() < 0.2) {
			type = 'tank';
		} else if (Math.random() < 0.3 + wave * 0.02) {
			type = 'fast';
		} else {
			type = 'normal';
		}
		var enemy = new Enemy();
		enemy.init(type);
		// Spawn outside screen
		var edge = Math.floor(Math.random() * 4);
		var ex, ey;
		if (edge === 0) {
			// top
			ex = Math.random() * 2048;
			ey = -enemy.radius - 20;
		} else if (edge === 1) {
			// right
			ex = 2048 + enemy.radius + 20;
			ey = Math.random() * 2732;
		} else if (edge === 2) {
			// bottom
			ex = Math.random() * 2048;
			ey = 2732 + enemy.radius + 20;
		} else {
			// left
			ex = -enemy.radius - 20;
			ey = Math.random() * 2732;
		}
		enemy.x = ex;
		enemy.y = ey;
		enemy.target = player;
		enemies.push(enemy);
		game.addChild(enemy);
	}
}
// Spawn a powerup at random location
function spawnPowerup() {
	var types = ['shield', 'health', 'dual', 'enhanced', 'drone'];
	var type = types[Math.floor(Math.random() * types.length)];
	var powerup = new Powerup();
	powerup.init(type);
	powerup.x = 200 + Math.random() * (2048 - 400);
	powerup.y = 400 + Math.random() * (2732 - 800);
	powerups.push(powerup);
	game.addChild(powerup);
}
// Fire player bullets
function firePlayerBullets() {
	if (LK.ticks - player.lastShotTick < player.shootInterval) return;
	player.lastShotTick = LK.ticks;
	// Find nearest enemy
	var nearest = null;
	var minDist = 999999;
	for (var i = 0; i < enemies.length; i++) {
		var dx = enemies[i].x - player.x;
		var dy = enemies[i].y - player.y;
		var d = dx * dx + dy * dy;
		if (d < minDist) {
			minDist = d;
			nearest = enemies[i];
		}
	}
	if (!nearest) return; // Don't shoot if no enemies
	// Calculate angle toward nearest enemy
	var dx = nearest.x - player.x;
	var dy = nearest.y - player.y;
	var angle = Math.atan2(dy, dx);
	var num = player.dualShot ? 2 : 1;
	for (var i = 0; i < num; i++) {
		var bullet = new PlayerBullet();
		bullet.damage = player.enhanced ? 2 : 1;
		// For dual shot, both bullets go straight (no spread), but offset horizontally
		var offset = 0;
		if (num === 2) {
			// Perpendicular to shooting direction
			var perpX = -Math.sin(angle);
			var perpY = Math.cos(angle);
			offset = (i === 0 ? -1 : 1) * 32; // 32px left/right
			bullet.x = player.x + Math.cos(angle) * (player.radius + 30) + perpX * offset;
			bullet.y = player.y + Math.sin(angle) * (player.radius + 30) + perpY * offset;
		} else {
			bullet.x = player.x + Math.cos(angle) * (player.radius + 30);
			bullet.y = player.y + Math.sin(angle) * (player.radius + 30);
		}
		bullet.dirX = Math.cos(angle);
		bullet.dirY = Math.sin(angle);
		bullets.push(bullet);
		game.addChild(bullet);
	}
	LK.getSound('shoot').play();
}
// Fire drone bullets
function fireDroneBullets() {
	if (!player.hasDrone || !player.drone) return;
	if (LK.ticks - player.drone.lastShotTick < player.drone.shootInterval) return;
	player.drone.lastShotTick = LK.ticks;
	// Find nearest enemy
	var nearest = null;
	var minDist = 99999;
	for (var i = 0; i < enemies.length; i++) {
		var dx = enemies[i].x - player.drone.x;
		var dy = enemies[i].y - player.drone.y;
		var d = dx * dx + dy * dy;
		if (d < minDist) {
			minDist = d;
			nearest = enemies[i];
		}
	}
	if (!nearest) return;
	var dx = nearest.x - player.drone.x;
	var dy = nearest.y - player.drone.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist === 0) return;
	var bullet = new DroneBullet();
	bullet.dirX = dx / dist;
	bullet.dirY = dy / dist;
	bullet.x = player.drone.x + bullet.dirX * (player.drone.radius + 20);
	bullet.y = player.drone.y + bullet.dirY * (player.drone.radius + 20);
	droneBullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('drone_shoot').play();
}
// Handle dragging
function handleMove(x, y, obj) {
	if (!dragging) return;
	// Clamp to bounds
	var nx = x - dragOffsetX;
	var ny = y - dragOffsetY;
	var r = player.radius;
	if (nx < r) nx = r;
	if (nx > 2048 - r) nx = 2048 - r;
	if (ny < r) ny = r;
	if (ny > 2732 - r) ny = 2732 - r;
	player.x = nx;
	player.y = ny;
	lastTouchX = x;
	lastTouchY = y;
}
// Touch events
game.down = function (x, y, obj) {
	// Don't allow drag from top left 100x100
	if (x < 100 && y < 100) return;
	var dx = x - player.x;
	var dy = y - player.y;
	if (dx * dx + dy * dy < player.radius * player.radius * 2.5) {
		dragging = true;
		dragOffsetX = x - player.x;
		dragOffsetY = y - player.y;
		lastTouchX = x;
		lastTouchY = y;
	}
};
game.move = function (x, y, obj) {
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragging = false;
};
// Main update loop
game.update = function () {
	// Player update
	player.update();
	// Player auto-fire
	firePlayerBullets();
	// Drone update and fire
	if (player.hasDrone && player.drone) {
		player.drone.update();
		fireDroneBullets();
	}
	// Enemies update
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		// Check collision with player
		var dx = e.x - player.x;
		var dy = e.y - player.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < e.radius + player.radius - 10) {
			player.takeDamage(e.type === 'tank' ? 3 : 1);
			e.destroyed = true;
		}
		// Remove if offscreen
		if (e.x < -200 || e.x > 2248 || e.y < -200 || e.y > 2932) {
			e.destroyed = true;
		}
		// Remove if destroyed
		if (e.destroyed) {
			e.destroy();
			enemies.splice(i, 1);
			score += e.reward;
			LK.setScore(score);
		}
	}
	// Bullets update
	for (var i = bullets.length - 1; i >= 0; i--) {
		var b = bullets[i];
		b.update();
		var hit = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			var dx = e.x - b.x;
			var dy = e.y - b.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < e.radius + b.radius - 10) {
				e.takeDamage(b.damage);
				hit = true;
				break;
			}
		}
		// Remove if hit or offscreen
		if (hit || b.x < -100 || b.x > 2148 || b.y < -100 || b.y > 2832) {
			b.destroy();
			bullets.splice(i, 1);
		}
	}
	// Drone bullets update
	for (var i = droneBullets.length - 1; i >= 0; i--) {
		var b = droneBullets[i];
		b.update();
		var hit = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			var dx = e.x - b.x;
			var dy = e.y - b.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < e.radius + b.radius - 10) {
				e.takeDamage(1);
				hit = true;
				break;
			}
		}
		if (hit || b.x < -100 || b.x > 2148 || b.y < -100 || b.y > 2832) {
			b.destroy();
			droneBullets.splice(i, 1);
		}
	}
	// Powerups update
	for (var i = powerups.length - 1; i >= 0; i--) {
		var p = powerups[i];
		p.update();
		var dx = p.x - player.x;
		var dy = p.y - player.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < p.radius + player.radius + 10) {
			player.applyPowerup(p.type);
			LK.getSound('powerup').play();
			p.destroy();
			powerups.splice(i, 1);
		}
	}
	// Wave logic
	waveTicks++;
	if (enemies.length === 0 && waveTicks > 60) {
		wave++;
		waveTicks = 0;
		spawnEnemies();
		LK.effects.flashScreen(0x00ffcc, 400);
	}
	// Powerup spawn logic
	if (LK.ticks > nextPowerupTick) {
		spawnPowerup();
		nextPowerupTick = LK.ticks + 600 + Math.floor(Math.random() * 600);
	}
	// Update GUI
	updateGUI();
};
// Game start
function startGame() {
	createGUI();
	spawnPlayer();
	spawnEnemies();
	nextPowerupTick = LK.ticks + 300;
	score = 0;
	LK.setScore(0);
	LK.playMusic('bgmusic', {
		fade: {
			start: 0,
			end: 1,
			duration: 1200
		}
	});
}
startGame();

===================================================================
--- original.js
+++ change.js
@@ -267,8 +267,19 @@
 
 /**** 
 * Game Code
 ****/ 
+// Add background shape to the game scene
+var backgroundShape = LK.getAsset('background', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: 0,
+	width: 2048,
+	height: 2732,
+	color: 0x23283a // dark blueish background, adjust as desired
+});
+game.addChild(backgroundShape);
 // Music
 // Sounds
 // Drone
 // Powerups