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

/**** 
* Classes
****/ 
// Boss ship class
var BossShip = Container.expand(function () {
	var self = Container.call(this);
	// Attach boss asset (use enemyShip but much larger, and red tint)
	var boss = self.attachAsset('enemyShip', {
		width: 480,
		height: 480,
		color: 0xff0000,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = 240;
	self.isAlive = true;
	self.health = 40;
	self.maxHealth = 40;
	self.lastY = undefined;
	// Boss always at top center, stationary
	self.x = GAME_WIDTH / 2;
	self.y = 340;
	// Boss update
	self.update = function () {
		// Boss remains stationary at top center
		// Unique Skill 1: Radial bullet spread every 120 ticks
		if (LK.ticks % 120 === 0) {
			var numBullets = 14;
			for (var i = 0; i < numBullets; i++) {
				var angle = 2 * Math.PI / numBullets * i;
				var bullet = new EnemyBullet();
				bullet.x = self.x;
				bullet.y = self.y + 220;
				// Give bullet a custom direction
				bullet.customVX = Math.cos(angle) * 13;
				bullet.customVY = Math.sin(angle) * 13;
				bullet.update = function () {
					this.x += this.customVX;
					this.y += this.customVY;
				};
				enemyBullets.push(bullet);
				game.addChild(bullet);
			}
		}
		// Unique Skill 2: Laser attack every 300 ticks (fires a fast straight bullet down the center)
		if (LK.ticks % 300 === 0) {
			var laser = new EnemyBullet();
			laser.x = self.x;
			laser.y = self.y + 260;
			laser.speed = 38;
			laser.radius = 60;
			// Make it visually larger
			var asset = laser.children[0];
			if (asset) {
				asset.width = 90;
				asset.height = 340;
			}
			enemyBullets.push(laser);
			game.addChild(laser);
		}
		// Unique Skill 3: Area attack (big slow bullet straight down) every 180 ticks
		if (LK.ticks % 180 === 0) {
			var area = new EnemyBullet();
			area.x = self.x;
			area.y = self.y + 240;
			area.speed = 10;
			area.radius = 120;
			var asset = area.children[0];
			if (asset) {
				asset.width = 220;
				asset.height = 120;
			}
			enemyBullets.push(area);
			game.addChild(area);
		}
	};
	// Flash on hit
	self.flash = function () {
		tween(boss, {
			tint: 0xffffff
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(boss, {
					tint: 0xff0000
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Enemy bullet class
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	// Attach bullet asset (red, 24x48)
	var bullet = self.attachAsset('enemyBullet', {
		width: 24,
		height: 48,
		color: 0xff4444,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 14;
	self.radius = 12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy ship class
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	// Attach enemy asset (ellipse, magenta, 220x220)
	var enemy = self.attachAsset('enemyShip', {
		width: 220,
		height: 220,
		color: 0xff33cc,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = 110;
	self.speed = 4 + Math.random() * 2; // Vary speed
	self.dirX = (Math.random() - 0.5) * 2; // Slight horizontal drift
	// For movement patterns
	self.waveOffset = Math.random() * Math.PI * 2;
	// For collision
	self.isAlive = true;
	// Update per frame
	self.update = function () {
		// Move down, with a sine wave pattern
		self.y += self.speed;
		self.x += Math.sin(LK.ticks / 30 + self.waveOffset) * 2 + self.dirX;
		// Prevent enemy from moving outside the horizontal screen area
		var minX = 60;
		var maxX = 2048 - 60;
		if (self.x < minX) {
			self.x = minX;
			self.dirX = Math.abs(self.dirX); // bounce right
		}
		if (self.x > maxX) {
			self.x = maxX;
			self.dirX = -Math.abs(self.dirX); // bounce left
		}
	};
	// Flash on hit
	self.flash = function () {
		tween(enemy, {
			tint: 0xffffff
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(enemy, {
					tint: 0xff33cc
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Player bullet class
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	// Attach bullet asset (yellow, 30x60)
	var bullet = self.attachAsset('playerBullet', {
		width: 30,
		height: 60,
		color: 0xffe066,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -22;
	self.radius = 15;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Player spaceship class
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	// Attach ship asset (box, blue, 220x220)
	var ship = self.attachAsset('playerShip', {
		width: 220,
		height: 220,
		color: 0x3399ff,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Ship properties
	self.radius = 110; // for collision
	self.isAlive = true;
	// Ship flash effect on hit
	self.flash = function () {
		tween(ship, {
			tint: 0xff3333
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(ship, {
					tint: 0x3399ff
				}, {
					duration: 200
				});
			}
		});
	};
	return self;
});
// Powerup class
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	// Attach powerup asset (green ellipse, 60x60)
	var pu = self.attachAsset('powerUp', {
		width: 60,
		height: 60,
		color: 0x44ff88,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = 30;
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000010
});

/**** 
* Game Code
****/ 
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var PLAYER_START_X = GAME_WIDTH / 2;
var PLAYER_START_Y = GAME_HEIGHT - 350;
// Level system variables
var currentLevel = 1;
var enemiesPerLevel = 6; // base number of enemies for level 1
var enemiesToSpawn = enemiesPerLevel;
var enemiesKilledThisLevel = 0;
var enemyScoreBase = 10; // base score for level 1
var enemyScoreThisLevel = enemyScoreBase;
// Game state
var player;
var enemies = [];
var playerBullets = [];
var enemyBullets = [];
var powerUps = [];
var dragNode = null;
var lastScore = 0;
var scoreTxt;
var powerUpActive = false;
var powerUpTimer = 0;
var enemySpawnTimer = 0;
var enemyFireTimer = 0;
var powerUpSpawnTimer = 0;
var gameOver = false;
// Boss state
var bossActive = false;
var bossShip = null;
var bossHealthBar = null;
// Score and High Score display (top left, avoid top left 100x100)
var highScore = storage.get('highScore') || 0;
scoreTxt = new Text2('Score: 0\nHigh: ' + highScore, {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
scoreTxt.x = 120;
scoreTxt.y = 0;
LK.gui.top.addChild(scoreTxt);
// Health system
var playerHealth = 5;
var healthTxt = new Text2('Health: 5', {
	size: 50,
	fill: 0xFF4444
});
healthTxt.anchor.set(0, 0);
healthTxt.x = 120;
healthTxt.y = 0;
LK.gui.top.addChild(healthTxt);
// Level display (top left, avoid top left 100x100)
var levelTxt = new Text2('Level 1', {
	size: 40,
	fill: 0xFFD700
});
levelTxt.anchor.set(0, 0);
levelTxt.x = 120;
levelTxt.y = 100;
LK.gui.top.addChild(levelTxt);
// Enemies left display (top left, avoid top left 100x100)
var enemiesLeftTxt = new Text2('Enemies: 0', {
	size: 50,
	fill: 0xFF8888
});
enemiesLeftTxt.anchor.set(0, 0);
enemiesLeftTxt.x = 120;
enemiesLeftTxt.y = 60;
LK.gui.top.addChild(enemiesLeftTxt);
// Initialize player
player = new PlayerShip();
player.x = PLAYER_START_X;
player.y = PLAYER_START_Y;
game.addChild(player);
// Touch/move controls
function handleMove(x, y, obj) {
	if (dragNode && player.isAlive) {
		// Clamp to game area, avoid top 100px (menu)
		var px = Math.max(60, Math.min(GAME_WIDTH - 60, x));
		var py = Math.max(200, Math.min(GAME_HEIGHT - 60, y));
		dragNode.x = px;
		dragNode.y = py;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	if (player.isAlive) {
		dragNode = player;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Helper: collision check (circle vs circle)
function circlesIntersect(a, b) {
	var dx = a.x - b.x;
	var dy = a.y - b.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	return dist < a.radius + b.radius;
}
// Helper: spawn enemy
function spawnEnemy() {
	var enemy = new EnemyShip();
	// Spawn in random horizontal position, avoid edges
	enemy.x = 120 + Math.random() * (GAME_WIDTH - 240);
	enemy.y = -100;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Helper: spawn enemy bullet
function spawnEnemyBullet(enemy) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 60;
	enemyBullets.push(bullet);
	game.addChild(bullet);
}
// Helper: spawn player bullet
function spawnPlayerBullet() {
	var bullet = new PlayerBullet();
	bullet.x = player.x;
	bullet.y = player.y - 80;
	playerBullets.push(bullet);
	game.addChild(bullet);
}
// Helper: spawn powerup
function spawnPowerUp() {
	var pu = new PowerUp();
	pu.x = 120 + Math.random() * (GAME_WIDTH - 240);
	pu.y = -60;
	powerUps.push(pu);
	game.addChild(pu);
}
// Powerup effect: double shot
function activatePowerUp() {
	powerUpActive = true;
	powerUpTimer = LK.ticks + 360; // 6 seconds at 60fps
	// Flash player ship green
	tween(player, {
		tint: 0x44ff88
	}, {
		duration: 200,
		onFinish: function onFinish() {
			tween(player, {
				tint: 0x3399ff
			}, {
				duration: 200
			});
		}
	});
}
// Main game update
game.update = function () {
	if (!player.isAlive) {
		return;
	}
	// --- Player auto-fire ---
	if (LK.ticks % (powerUpActive ? 7 : 14) === 0) {
		if (powerUpActive) {
			// Double shot: two bullets
			var b1 = new PlayerBullet();
			b1.x = player.x - 36;
			b1.y = player.y - 80;
			playerBullets.push(b1);
			game.addChild(b1);
			var b2 = new PlayerBullet();
			b2.x = player.x + 36;
			b2.y = player.y - 80;
			playerBullets.push(b2);
			game.addChild(b2);
		} else {
			spawnPlayerBullet();
		}
	}
	// --- Enemy spawn ---
	if (!bossActive && enemySpawnTimer <= LK.ticks && enemiesToSpawn > 0) {
		spawnEnemy();
		enemiesToSpawn--;
		// Escalate spawn rate
		var minDelay = 24,
			maxDelay = 60;
		var delay = Math.max(minDelay, maxDelay - Math.floor(LK.getScore() / 10) * 4);
		enemySpawnTimer = LK.ticks + delay;
		// Update enemies left UI
		enemiesLeftTxt.setText('Enemies: ' + (enemiesToSpawn + enemies.length));
	}
	// --- Enemy fire ---
	if (!bossActive && enemyFireTimer <= LK.ticks && enemies.length > 0) {
		// Pick random enemy to fire
		var idx = Math.floor(Math.random() * enemies.length);
		if (enemies[idx]) {
			spawnEnemyBullet(enemies[idx]);
		}
		// Reduce fire rate: increase min and max fire delay for better balance
		var minFire = 36,
			// was 18
			maxFire = 100; // was 50
		var fireDelay = Math.max(minFire, maxFire - Math.floor(LK.getScore() / 10) * 3);
		enemyFireTimer = LK.ticks + fireDelay;
	}
	// --- Powerup spawn ---
	if (powerUpSpawnTimer <= LK.ticks) {
		if (Math.random() < 0.18) {
			// ~18% chance
			spawnPowerUp();
		}
		powerUpSpawnTimer = LK.ticks + 300 + Math.floor(Math.random() * 200);
	}
	// --- Powerup timer ---
	if (powerUpActive && LK.ticks > powerUpTimer) {
		powerUpActive = false;
	}
	// --- Update player bullets ---
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var b = playerBullets[i];
		b.update();
		// Remove if off screen
		if (b.y < -80) {
			b.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			if (e.isAlive && circlesIntersect(b, e)) {
				e.isAlive = false;
				e.flash();
				b.destroy();
				playerBullets.splice(i, 1);
				e.destroy();
				enemies.splice(j, 1);
				// Score (scaled by level)
				LK.setScore(LK.getScore() + enemyScoreThisLevel);
				if (LK.getScore() > highScore) {
					highScore = LK.getScore();
					storage.set('highScore', highScore);
				}
				scoreTxt.setText('Score: ' + LK.getScore() + '\nHigh: ' + highScore);
				// Track kills for level progression
				enemiesKilledThisLevel++;
				enemiesLeftTxt.setText('Enemies: ' + (enemiesToSpawn + enemies.length));
				// If all enemies for this level are killed, progress to next level
				if (enemiesKilledThisLevel >= enemiesPerLevel) {
					// Boss fight every 5 levels
					if ((currentLevel + 1) % 5 === 0) {
						// Spawn boss
						bossActive = true;
						bossShip = new BossShip();
						// BossShip class now sets its own x/y to top center and is stationary
						game.addChild(bossShip);
						// Add boss health bar
						if (bossHealthBar) {
							LK.gui.top.removeChild(bossHealthBar);
						}
						bossHealthBar = new Text2('Boss: ' + bossShip.health + '/' + bossShip.maxHealth, {
							size: 90,
							fill: 0xFF2222
						});
						bossHealthBar.anchor.set(0.5, 0);
						bossHealthBar.x = GAME_WIDTH / 2;
						bossHealthBar.y = 80;
						LK.gui.top.addChild(bossHealthBar);
						// UI
						levelTxt.setText('Boss Level ' + (currentLevel + 1));
						enemiesLeftTxt.setText('Boss Fight!');
						LK.effects.flashScreen(0xffcc00, 600);
					} else {
						// Next level!
						currentLevel++;
						enemiesPerLevel = Math.floor(enemiesPerLevel * 1.25) + 1; // escalate number of enemies
						enemiesToSpawn = enemiesPerLevel;
						enemiesKilledThisLevel = 0;
						enemyScoreThisLevel = enemyScoreBase * Math.pow(2, currentLevel - 1);
						// Update UI
						levelTxt.setText('Level ' + currentLevel);
						enemiesLeftTxt.setText('Enemies: ' + (enemiesToSpawn + enemies.length));
						// Optionally: flash screen or give feedback
						LK.effects.flashScreen(0x00ffcc, 400);
					}
				}
				break;
			}
		}
	}
	// --- Boss fight logic ---
	if (bossActive && bossShip && bossShip.isAlive) {
		bossShip.update();
		// Boss health bar always at top center and visible only when boss is present
		if (!bossHealthBar) {
			bossHealthBar = new Text2('Boss: ' + bossShip.health + '/' + bossShip.maxHealth, {
				size: 90,
				fill: 0xFF2222
			});
			bossHealthBar.anchor.set(0.5, 0);
			bossHealthBar.x = GAME_WIDTH / 2;
			bossHealthBar.y = 80;
			LK.gui.top.addChild(bossHealthBar);
		} else {
			bossHealthBar.x = GAME_WIDTH / 2;
			bossHealthBar.y = 80;
			bossHealthBar.setText('Boss: ' + bossShip.health + '/' + bossShip.maxHealth);
		}
		// Check player bullet collision with boss
		for (var i = playerBullets.length - 1; i >= 0; i--) {
			var b = playerBullets[i];
			if (bossShip.isAlive && circlesIntersect(bossShip, b)) {
				bossShip.health--;
				bossShip.flash();
				b.destroy();
				playerBullets.splice(i, 1);
				if (bossShip.health <= 0) {
					bossShip.isAlive = false;
					bossActive = false;
					// Remove boss health bar
					if (bossHealthBar) {
						LK.gui.top.removeChild(bossHealthBar);
						bossHealthBar = null;
					}
					// Score for boss
					LK.setScore(LK.getScore() + 100 * currentLevel);
					if (LK.getScore() > highScore) {
						highScore = LK.getScore();
						storage.set('highScore', highScore);
					}
					scoreTxt.setText('Score: ' + LK.getScore() + '\nHigh: ' + highScore);
					// Next level
					currentLevel++;
					enemiesPerLevel = Math.floor(enemiesPerLevel * 1.25) + 1;
					enemiesToSpawn = enemiesPerLevel;
					enemiesKilledThisLevel = 0;
					enemyScoreThisLevel = enemyScoreBase * Math.pow(2, currentLevel - 1);
					levelTxt.setText('Level ' + currentLevel);
					enemiesLeftTxt.setText('Enemies: ' + enemiesPerLevel);
					LK.effects.flashScreen(0x00ffcc, 600);
					// Remove boss
					bossShip.destroy();
					bossShip = null;
				}
				break;
			}
		}
		// Boss collision with player
		if (player.isAlive && bossShip && bossShip.isAlive && circlesIntersect(bossShip, player)) {
			bossShip.isAlive = false;
			bossActive = false;
			if (bossHealthBar) {
				LK.gui.top.removeChild(bossHealthBar);
				bossHealthBar = null;
			}
			player.flash();
			playerHealth--;
			healthTxt.setText('Health: ' + playerHealth);
			LK.effects.flashScreen(0xff0000, 400);
			if (playerHealth <= 0) {
				player.isAlive = false;
				tween(player, {
					alpha: 0.2
				}, {
					duration: 400
				});
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 900);
			}
			bossShip.destroy();
			bossShip = null;
		}
	}
	// --- Update enemy bullets ---
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var eb = enemyBullets[i];
		eb.update();
		if (eb.y > GAME_HEIGHT + 80) {
			eb.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player.isAlive && circlesIntersect(eb, player)) {
			eb.destroy();
			enemyBullets.splice(i, 1);
			player.flash();
			playerHealth--;
			healthTxt.setText('Health: ' + playerHealth);
			LK.effects.flashScreen(0xff0000, 400);
			if (playerHealth <= 0) {
				// Game over
				player.isAlive = false;
				tween(player, {
					alpha: 0.2
				}, {
					duration: 400
				});
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 900);
				break;
			}
		}
	}
	// --- Update enemies ---
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		// Track lastY for crossing detection
		if (typeof e.lastY === "undefined") e.lastY = e.y;
		e.update();
		// If enemy crosses into player's area (y > PLAYER_START_Y - 110, i.e. bottom of player ship)
		if (e.lastY <= PLAYER_START_Y - 110 && e.y > PLAYER_START_Y - 110) {
			// Only trigger if enemy is alive
			if (e.isAlive && player.isAlive) {
				e.isAlive = false;
				tween(e, {}, {
					duration: 120,
					onFinish: function onFinish() {
						e.destroy();
					}
				});
				enemies.splice(i, 1);
				playerHealth--;
				healthTxt.setText('Health: ' + playerHealth);
				LK.effects.flashScreen(0xff0000, 400);
				// Level progression if this was the last enemy for the level
				enemiesLeftTxt.setText('Enemies: ' + (enemiesToSpawn + enemies.length));
				if (enemiesKilledThisLevel + 1 >= enemiesPerLevel && enemiesToSpawn === 0 && enemies.length === 0) {
					// Next level!
					currentLevel++;
					enemiesPerLevel = Math.floor(enemiesPerLevel * 1.25) + 1;
					enemiesToSpawn = enemiesPerLevel;
					enemiesKilledThisLevel = 0;
					enemyScoreThisLevel = enemyScoreBase * Math.pow(2, currentLevel - 1);
					// Update UI
					levelTxt.setText('Level ' + currentLevel);
					enemiesLeftTxt.setText('Enemies: ' + (enemiesToSpawn + enemies.length));
					LK.effects.flashScreen(0x00ffcc, 400);
				} else {
					// Only increment kills if not progressing level
					enemiesKilledThisLevel++;
				}
				if (playerHealth <= 0) {
					// Game over
					player.isAlive = false;
					tween(player, {
						alpha: 0.2
					}, {
						duration: 400
					});
					LK.setTimeout(function () {
						LK.showGameOver();
					}, 900);
					break;
				}
				continue;
			}
		}
		if (e.y > GAME_HEIGHT + 100) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player.isAlive && e.isAlive && circlesIntersect(e, player)) {
			e.isAlive = false;
			e.flash();
			player.flash();
			tween(e, {}, {
				duration: 120,
				onFinish: function onFinish() {
					e.destroy();
				}
			});
			enemies.splice(i, 1);
			playerHealth--;
			healthTxt.setText('Health: ' + playerHealth);
			LK.effects.flashScreen(0xff0000, 400);
			if (playerHealth <= 0) {
				// Game over
				player.isAlive = false;
				tween(player, {
					alpha: 0.2
				}, {
					duration: 400
				});
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 900);
				break;
			}
		}
		// Update lastY for next frame
		e.lastY = e.y;
	}
	// --- Update powerups ---
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var pu = powerUps[i];
		pu.update();
		if (pu.y > GAME_HEIGHT + 80) {
			pu.destroy();
			powerUps.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player.isAlive && circlesIntersect(pu, player)) {
			pu.destroy();
			powerUps.splice(i, 1);
			activatePowerUp();
		}
	}
};
// Set initial score
LK.setScore(0);
highScore = storage.get('highScore') || 0;
scoreTxt.setText('Score: 0\nHigh: ' + highScore);
// Reset level system
currentLevel = 1;
enemiesPerLevel = 6;
enemiesToSpawn = enemiesPerLevel;
enemiesKilledThisLevel = 0;
enemyScoreThisLevel = enemyScoreBase;
levelTxt.setText('Level 1');
enemiesLeftTxt.setText('Enemies: ' + enemiesPerLevel);
playerHealth = 5;
healthTxt.setText('Health: ' + playerHealth);
// Reset boss state
bossActive = false;
if (bossShip) {
	bossShip.destroy();
	bossShip = null;
}
if (bossHealthBar) {
	LK.gui.top.removeChild(bossHealthBar);
	bossHealthBar = null;
}

===================================================================
--- original.js
+++ change.js
@@ -1,8 +1,9 @@
 /**** 
 * Plugins
 ****/ 
 var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
 
 /**** 
 * Classes
 ****/