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

/**** 
* Classes
****/ 
var Boss1Ship = Container.expand(function () {
	var self = Container.call(this);
	var bossGraphics = self.attachAsset('bossShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 500;
	self.maxHealth = 500;
	self.speed = 2;
	self.shootCooldown = 0;
	self.shootRate = 60;
	self.moveDirection = 1;
	self.moveTimer = 0;
	self.moveInterval = 120;
	self.bossNumber = 1;
	self.startX = 1024;
	self.attackPhaseTimer = 0;
	self.isAttackPhase = true;
	self.update = function () {
		self.attackPhaseTimer++;
		if (self.isAttackPhase && self.attackPhaseTimer <= 600) {
			self.moveTimer++;
			var circleX = Math.cos(self.moveTimer / 30) * 150;
			var circleY = Math.sin(self.moveTimer / 60) * 100;
			var movePattern = Math.sin(self.moveTimer / 20) * 600;
			self.x = self.startX + movePattern + circleX;
			self.y = 300 + circleY;
			if (self.x < 50 || self.x > 1998) {
				self.x = self.startX;
				self.moveTimer = 0;
			}
			self.y = Math.max(100, Math.min(800, self.y));
			self.shootCooldown--;
		} else if (self.isAttackPhase && self.attackPhaseTimer > 600) {
			self.isAttackPhase = false;
			self.attackPhaseTimer = 0;
		}
		if (!self.isAttackPhase) {
			self.shootCooldown = 1000;
			if (self.attackPhaseTimer >= 300) {
				self.isAttackPhase = true;
				self.attackPhaseTimer = 0;
				self.shootCooldown = 0;
			}
			self.attackPhaseTimer++;
		}
	};
	return self;
});
var Boss2Ship = Container.expand(function () {
	var self = Container.call(this);
	var bossGraphics = self.attachAsset('bossShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 700;
	self.maxHealth = 700;
	self.speed = 5;
	self.shootCooldown = 0;
	self.shootRate = 45;
	self.moveDirection = 1;
	self.moveTimer = 0;
	self.moveInterval = 120;
	self.bossNumber = 2;
	self.startX = 1024;
	self.attackPhaseTimer = 0;
	self.isAttackPhase = true;
	self.velocityX = 5; //{Boss2-velX}
	self.velocityY = 4; //{Boss2-velY}
	self.lastContactWithPlayer = false; //{Boss2-lastContact}
	self.update = function () {
		self.attackPhaseTimer++;
		if (self.isAttackPhase && self.attackPhaseTimer <= 600) {
			self.x += self.velocityX;
			self.y += self.velocityY;
			if (self.x < 100 || self.x > 1948) {
				self.velocityX *= -1;
			} //{Boss2-bounceX}
			if (self.y < 150 || self.y > 800) {
				self.velocityY *= -1;
			} //{Boss2-bounceY}
			self.shootCooldown--;
		} else if (self.isAttackPhase && self.attackPhaseTimer > 600) {
			self.isAttackPhase = false;
			self.attackPhaseTimer = 0;
		}
		if (!self.isAttackPhase) {
			self.shootCooldown = 1000;
			self.velocityX = 0;
			self.velocityY = 0;
			if (self.attackPhaseTimer >= 300) {
				self.isAttackPhase = true;
				self.attackPhaseTimer = 0;
				self.shootCooldown = 0;
				self.velocityX = Math.random() * 6 - 3;
				self.velocityY = Math.random() * 6 - 3;
			}
		}
	};
	return self;
});
var Boss3Ship = Container.expand(function () {
	var self = Container.call(this);
	var bossGraphics = self.attachAsset('bossShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 900;
	self.maxHealth = 900;
	self.speed = 4;
	self.shootCooldown = 0;
	self.shootRate = 30;
	self.moveDirection = 1;
	self.moveTimer = 0;
	self.moveInterval = 120;
	self.bossNumber = 3;
	self.startX = 1024;
	self.attackPhaseTimer = 0;
	self.isAttackPhase = true;
	self.update = function () {
		self.attackPhaseTimer++;
		if (self.isAttackPhase && self.attackPhaseTimer <= 400) {
			self.moveTimer++;
			var circleX = Math.cos(self.moveTimer / 20) * 250;
			var circleY = Math.sin(self.moveTimer / 40) * 200;
			var movePattern = Math.sin(self.moveTimer / 10) * 800;
			self.x = self.startX + movePattern + circleX;
			self.y = 200 + circleY;
			if (self.x < 50 || self.x > 1998) {
				self.x = self.startX;
				self.moveTimer = 0;
			}
			self.y = Math.max(100, Math.min(800, self.y));
			self.shootCooldown--;
		} else if (self.isAttackPhase && self.attackPhaseTimer > 400) {
			self.isAttackPhase = false;
			self.attackPhaseTimer = 0;
		}
		if (!self.isAttackPhase) {
			self.shootCooldown = 600;
			if (self.attackPhaseTimer >= 200) {
				self.isAttackPhase = true;
				self.attackPhaseTimer = 0;
				self.shootCooldown = 0;
			}
			self.attackPhaseTimer++;
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 1;
	self.maxHealth = 1;
	self.speed = 3;
	self.shootCooldown = 0;
	self.shootRate = 60;
	self.waveNumber = 1;
	self.update = function () {
		self.y += self.speed;
		self.shootCooldown--;
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	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 = 25;
	self.maxHealth = 25;
	self.speed = 6;
	self.shootCooldown = 0;
	self.shootRate = 15;
	self.firepower = 1;
	self.armor = 1;
	self.upgradePoints = 0;
	self.down = function (x, y, obj) {
		//Placeholder for future touch interactions
	};
	self.up = function (x, y, obj) {
		//Placeholder for future touch interactions
	};
	self.move = function (x, y, obj) {
		//Handled by game.move
	};
	self.update = function () {
		self.shootCooldown--;
	};
	return self;
});
var UpgradePickup = Container.expand(function () {
	var self = Container.call(this);
	var pickupGraphics = self.attachAsset('upgradePickup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.upgradeType = 'firepower';
	self.worldType = 1;
	self.floatSpeed = 2;
	self.floatDirection = -1;
	self.originalY = 0;
	self.setWorldType = function (worldNum) {
		self.worldType = worldNum;
		if (worldNum === 2) {
			pickupGraphics.tint = 0x00ffff;
		} else if (worldNum === 3) {
			pickupGraphics.tint = 0xff00ff;
		}
	};
	self.update = function () {
		self.y += self.floatSpeed * self.floatDirection;
		if (self.y < self.originalY - 40 || self.y > self.originalY + 40) {
			self.floatDirection *= -1;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x001a4d
});

/**** 
* Game Code
****/ 
//Game state variables
var playerShip = null;
var enemyBullets = [];
var playerBullets = [];
var enemies = [];
var bosses = [];
var upgradePickups = [];
var waveNumber = 1;
var bossNumber = 1;
var waveEnemyCount = 0;
var waveEnemiesDefeated = 0;
var isBossWave = false;
var gameState = 'playing';
var moveDirection = 0;
var touchX = 1024;
//UI Elements
var healthText = new Text2('Health: 25/25', {
	size: 80,
	fill: '#ffffff'
});
healthText.anchor.set(0, 0);
LK.gui.topRight.addChild(healthText);
var playerHealthBarBg = LK.getAsset('starfield', {
	width: 300,
	height: 25,
	color: 0x333333,
	shape: 'box'
});
playerHealthBarBg.anchor.set(0, 0.5);
LK.gui.topRight.addChild(playerHealthBarBg);
var playerHealthBar = LK.getAsset('starfield', {
	width: 280,
	height: 15,
	color: 0x00ff00,
	shape: 'box'
});
playerHealthBar.anchor.set(0, 0.5);
LK.gui.topRight.addChild(playerHealthBar);
var upgradeText = new Text2('Upgrades: 0', {
	size: 80,
	fill: '#ffff00'
});
upgradeText.anchor.set(0, 0);
LK.gui.top.addChild(upgradeText);
var waveText = new Text2('Wave: 1', {
	size: 80,
	fill: '#00ff00'
});
waveText.anchor.set(1, 0);
LK.gui.topRight.addChild(waveText);
var bossHealthBarBg = LK.getAsset('starfield', {
	width: 400,
	height: 30,
	color: 0x333333,
	shape: 'box'
});
bossHealthBarBg.anchor.set(0.5, 0.5);
bossHealthBarBg.visible = false;
LK.gui.top.addChild(bossHealthBarBg);
var bossHealthBar = LK.getAsset('starfield', {
	width: 380,
	height: 20,
	color: 0xff0000,
	shape: 'box'
});
bossHealthBar.anchor.set(0, 0.5);
bossHealthBar.visible = false;
LK.gui.top.addChild(bossHealthBar);
var bossHealthText = new Text2('Boss Health', {
	size: 60,
	fill: '#ff0000'
});
bossHealthText.anchor.set(0.5, 0.5);
bossHealthText.visible = false;
LK.gui.top.addChild(bossHealthText);
var world2Button = LK.getAsset('starfield', {
	width: 300,
	height: 100,
	color: 0x00ffff,
	shape: 'box'
}); //{3a-world2}
world2Button.anchor.set(0.5, 0.5);
world2Button.interactive = true;
world2Button.visible = false;
LK.gui.bottomRight.addChild(world2Button);
var world2ButtonText = new Text2('World 2', {
	size: 60,
	fill: '#000000'
}); //{3b-world2}
world2ButtonText.anchor.set(0.5, 0.5);
world2Button.addChild(world2ButtonText);
world2Button.down = function (x, y, obj) {
	if (waveNumber === 1 && bosses.length === 0 && enemies.length === 0) {
		waveNumber = 2;
		bossNumber = 2;
		world2Button.visible = false;
		world3Button.visible = true;
		spawnBoss();
	}
}; //{3c-world2}
var world3Button = LK.getAsset('starfield', {
	width: 300,
	//{3c-world3}
	height: 100,
	color: 0xff00ff,
	shape: 'box' //{3d-world3}
}); //{3a-world3}
world3Button.anchor.set(0.5, 0.5);
world3Button.interactive = true;
world3Button.visible = false;
LK.gui.bottomLeft.addChild(world3Button);
var world3ButtonText = new Text2('World 3', {
	size: 60,
	//{3e-world3}
	fill: '#000000'
}); //{3b-world3}
world3ButtonText.anchor.set(0.5, 0.5);
world3Button.addChild(world3ButtonText);
world3Button.down = function (x, y, obj) {
	if (waveNumber === 2 && bosses.length === 0 && enemies.length === 0) {
		waveNumber = 3;
		bossNumber = 3;
		world3Button.visible = false;
		playerShip.health = 1000;
		playerShip.maxHealth = 1000;
		healthText.setText('Health: 1000/1000');
		spawnBoss();
	} //{3g-world3}
}; //{3c-world3}
var pauseMenuBg = LK.getAsset('starfield', {
	width: 1024,
	height: 800,
	color: 0x000000,
	shape: 'box'
});
pauseMenuBg.alpha = 0.9;
pauseMenuBg.visible = false;
LK.gui.center.addChild(pauseMenuBg);
var pauseTitle = new Text2('PAUSED', {
	size: 150,
	fill: '#ffff00'
});
pauseTitle.anchor.set(0.5, 0.5);
pauseTitle.visible = false;
LK.gui.center.addChild(pauseTitle);
var pauseInfo = new Text2('Tap to Resume', {
	size: 100,
	fill: '#ffffff'
});
pauseInfo.anchor.set(0.5, 0.5);
pauseInfo.visible = false;
LK.gui.center.addChild(pauseInfo);
//Add starfield background
var starfield = game.addChild(LK.getAsset('starfield', {
	anchorX: 0,
	anchorY: 0
}));
starfield.x = 0;
starfield.y = 0;
//Add pixel art stars to background
for (var s = 0; s < 200; s++) {
	var star = game.addChild(LK.getAsset('pixelStar', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	star.x = Math.random() * 2048;
	star.y = Math.random() * 2732;
}
//Add pixel art planets to background
var planet1 = game.addChild(LK.getAsset('pixelPlanet1', {
	anchorX: 0.5,
	anchorY: 0.5
}));
planet1.x = 300;
planet1.y = 400;
planet1.alpha = 0.6;
var planet2 = game.addChild(LK.getAsset('pixelPlanet2', {
	anchorX: 0.5,
	anchorY: 0.5
}));
planet2.x = 1800;
planet2.y = 1200;
planet2.alpha = 0.5;
var planet3 = game.addChild(LK.getAsset('pixelPlanet3', {
	anchorX: 0.5,
	anchorY: 0.5
}));
planet3.x = 500;
planet3.y = 2200;
planet3.alpha = 0.7;
//Initialize player ship
playerShip = game.addChild(new PlayerShip());
playerShip.x = 1024;
playerShip.y = 2400;
//Start music
LK.playMusic('spaceMusic', {
	loop: true
});
//Function to get world-specific upgrade pool
function getWorldUpgrades() {
	if (waveNumber === 1) {
		return ['firepower', 'armor', 'speed'];
	} else if (waveNumber === 2) {
		return ['firepower', 'armor', 'speed', 'rapidFire', 'shield'];
	} else if (waveNumber === 3) {
		return ['firepower', 'armor', 'speed', 'rapidFire', 'shield', 'laser', 'multishot'];
	}
	return ['firepower', 'armor', 'speed'];
}
//Function to calculate enemy wave count
function calculateWaveSize() {
	return 8 + Math.floor(waveNumber / 2);
}
//Function to spawn enemy wave
function spawnEnemyWave() {
	if (waveNumber === 3) {
		waveEnemyCount = 0;
		waveEnemiesDefeated = 0;
		isBossWave = false;
		LK.setTimeout(function () {
			if (enemies.length === 0 && bosses.length === 0) {
				spawnBoss();
			}
		}, 1000);
		return;
	}
	waveEnemyCount = 9;
	waveEnemiesDefeated = 0;
	isBossWave = false;
	for (var wave = 0; wave < 3; wave++) {
		LK.setTimeout(function (w) {
			return function () {
				for (var i = 0; i < 3; i++) {
					var enemy = game.addChild(new EnemyShip());
					enemy.x = 100 + Math.random() * 1848;
					enemy.y = -100 - i * 150;
					enemy.speed = 2 + waveNumber * 0.3;
					enemy.shootRate = 60;
					enemy.waveNumber = waveNumber;
					enemy.lastBulletIntersecting = false;
					enemies.push(enemy);
				}
			};
		}(wave), wave * 15000);
	}
}
//Function to spawn boss wave
function spawnBoss() {
	isBossWave = true;
	waveEnemiesDefeated = 0;
	var boss;
	if (bossNumber === 1) {
		boss = game.addChild(new Boss1Ship());
	} else if (bossNumber === 2) {
		boss = game.addChild(new Boss2Ship());
	} else if (bossNumber === 3) {
		boss = game.addChild(new Boss3Ship());
	} else {
		boss = game.addChild(new Boss3Ship());
	}
	boss.x = 1024;
	boss.startX = 1024;
	boss.y = 300;
	boss.shootRate = Math.max(35, 60 - bossNumber * 3);
	bossHealthBarBg.visible = true;
	bossHealthBar.visible = true;
	bossHealthText.visible = true;
	bosses.push(boss);
}
//Initialize first wave
spawnEnemyWave();
//Handle game movement
game.move = function (x, y, obj) {
	touchX = x;
	playerShip.x = Math.max(30, Math.min(2018, x));
	playerShip.y = Math.max(100, Math.min(2650, y));
};
//Main game update loop
game.update = function () {
	if (gameState !== 'playing') {
		return;
	}
	//Update player ship
	playerShip.update();
	playerShip.shootCooldown--;
	//Player shooting
	if (playerShip.shootCooldown <= 0) {
		for (var i = 0; i < playerShip.firepower; i++) {
			var offset = (playerShip.firepower - 1) * -15 + i * 30;
			var bullet = game.addChild(new PlayerBullet());
			bullet.x = playerShip.x + offset;
			bullet.y = playerShip.y - 40;
			bullet.damage = playerShip.firepower;
			playerBullets.push(bullet);
			LK.getSound('playerShoot').play();
		}
		playerShip.shootCooldown = playerShip.shootRate;
	}
	//Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		bullet.update();
		if (bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
	}
	//Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (!enemy) {
			continue;
		}
		enemy.update();
		//Enemy shooting
		enemy.shootCooldown--;
		if (enemy.shootCooldown <= 0) {
			var eBullet = game.addChild(new EnemyBullet());
			eBullet.x = enemy.x;
			eBullet.y = enemy.y + 30;
			enemyBullets.push(eBullet);
			LK.getSound('enemyShoot').play();
			enemy.shootCooldown = enemy.shootRate;
		}
		//Check enemy off-screen
		if (enemy.y > 2800) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		//Check bullet collisions with enemies
		for (var j = playerBullets.length - 1; j >= 0; j--) {
			var bullet = playerBullets[j];
			if (bullet && enemy && bullet.intersects(enemy) && !enemy.lastBulletIntersecting) {
				enemy.health -= bullet.damage;
				enemy.lastBulletIntersecting = true;
				bullet.destroy();
				playerBullets.splice(j, 1);
				if (enemy.health <= 0) {
					LK.getSound('explosion').play();
					LK.effects.flashObject(enemy, 0xff0000, 200);
					LK.setScore(LK.getScore() + 100);
					waveEnemiesDefeated++;
					//Drop upgrade pickup chance
					if (Math.random() < 0.3) {
						var pickup = game.addChild(new UpgradePickup());
						pickup.x = enemy.x;
						pickup.y = enemy.y;
						pickup.originalY = enemy.y;
						var worldUpgrades = getWorldUpgrades();
						pickup.upgradeType = worldUpgrades[Math.floor(Math.random() * worldUpgrades.length)];
						pickup.setWorldType(waveNumber);
						upgradePickups.push(pickup);
					}
					enemy.destroy();
					enemies.splice(i, 1);
				}
				break;
			}
		}
	}
	//Update bosses
	for (var i = bosses.length - 1; i >= 0; i--) {
		var boss = bosses[i];
		if (!boss) {
			continue;
		}
		boss.update();
		//Check Boss2 contact damage with player
		if (boss.bossNumber === 2 && boss.isAttackPhase) {
			if (boss.intersects(playerShip) && !boss.lastContactWithPlayer) {
				boss.lastContactWithPlayer = true;
				playerShip.health -= 1;
				LK.effects.flashObject(playerShip, 0xff0000, 200);
				if (playerShip.health <= 0) {
					gameState = 'gameover';
					LK.showGameOver();
				} //{Boss2-contactDamage}
			} else if (!boss.intersects(playerShip)) {
				boss.lastContactWithPlayer = false;
			}
		} //{Boss2-contactDamageEnd}
		//Boss shooting (multiple bullets)
		boss.shootCooldown--;
		if (boss.shootCooldown <= 0) {
			for (var b = 0; b < 2; b++) {
				var eBullet = game.addChild(new EnemyBullet());
				eBullet.x = boss.x + (b - 1) * 30;
				eBullet.y = boss.y + 60;
				enemyBullets.push(eBullet);
			}
			LK.getSound('enemyShoot').play();
			boss.shootCooldown = boss.shootRate;
		}
		//Check bullet collisions with boss
		for (var j = playerBullets.length - 1; j >= 0; j--) {
			var bullet = playerBullets[j];
			if (bullet && boss && bullet.intersects(boss)) {
				boss.health -= 1;
				bullet.destroy();
				playerBullets.splice(j, 1);
				LK.effects.flashObject(boss, 0xff00ff, 150);
				if (boss.health <= 0) {
					LK.getSound('explosion').play();
					LK.effects.flashScreen(0xffff00, 500);
					LK.setScore(LK.getScore() + 1000);
					//Grant boss defeat upgrade
					playerShip.upgradePoints += 3;
					playerShip.firepower += 1;
					playerShip.armor += 1;
					playerShip.health = playerShip.maxHealth;
					boss.destroy();
					bosses.splice(i, 1);
					bossNumber++;
					waveNumber++;
					//Spawn next wave after delay
					LK.setTimeout(function () {
						spawnEnemyWave();
					}, 1000);
				}
				break;
			}
		}
	}
	//Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		bullet.update();
		if (bullet.y > 2800) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		//Check collision with player
		if (bullet.intersects(playerShip) && !bullet.lastPlayerIntersecting) {
			bullet.lastPlayerIntersecting = true;
			playerShip.health -= Math.max(1, bullet.damage - (playerShip.armor - 1));
			bullet.destroy();
			enemyBullets.splice(i, 1);
			LK.effects.flashObject(playerShip, 0xff0000, 200);
			if (playerShip.health <= 0) {
				gameState = 'gameover';
				LK.showGameOver();
			}
			continue;
		}
	}
	//Update upgrade pickups
	for (var i = upgradePickups.length - 1; i >= 0; i--) {
		var pickup = upgradePickups[i];
		pickup.update();
		//Check collision with player
		if (pickup.intersects(playerShip) && !pickup.lastPlayerIntersecting) {
			pickup.lastPlayerIntersecting = true;
			LK.getSound('upgrade').play();
			if (pickup.upgradeType === 'firepower') {
				playerShip.firepower++;
			} else if (pickup.upgradeType === 'armor') {
				playerShip.armor++;
				playerShip.health = playerShip.maxHealth;
			} else if (pickup.upgradeType === 'speed') {
				playerShip.shootRate = Math.max(5, playerShip.shootRate - 2);
			} else if (pickup.upgradeType === 'rapidFire') {
				playerShip.shootRate = Math.max(5, playerShip.shootRate - 3);
			} else if (pickup.upgradeType === 'shield') {
				playerShip.armor += 2;
				playerShip.health = playerShip.maxHealth;
			} else if (pickup.upgradeType === 'laser') {
				playerShip.firepower += 2;
			} else if (pickup.upgradeType === 'multishot') {
				playerShip.firepower += 1;
				playerShip.shootRate = Math.max(5, playerShip.shootRate - 1);
			}
			playerShip.upgradePoints++;
			LK.effects.flashObject(playerShip, 0x00ff00, 300);
			pickup.destroy();
			upgradePickups.splice(i, 1);
			continue;
		}
		//Remove off-screen pickups
		if (pickup.y > 2800) {
			pickup.destroy();
			upgradePickups.splice(i, 1);
		}
	}
	//Check if wave is complete and spawn boss
	if (enemies.length === 0 && !isBossWave && bosses.length === 0 && waveEnemiesDefeated === waveEnemyCount && waveEnemyCount > 0) {
		waveEnemyCount = 0;
		LK.setTimeout(function () {
			if (enemies.length === 0 && bosses.length === 0) {
				spawnBoss();
			}
		}, 1500);
	}
	//Update boss health bar
	if (bosses.length > 0) {
		var boss = bosses[0];
		var healthPercentage = Math.max(0, boss.health / boss.maxHealth);
		bossHealthBar.scaleX = healthPercentage;
		bossHealthBarBg.x = 1024;
		bossHealthBarBg.y = 60;
		bossHealthBar.x = 1024 - 190;
		bossHealthBar.y = 60;
		bossHealthText.setText('Boss ' + boss.bossNumber + ' HP: ' + Math.max(0, boss.health) + '/' + boss.maxHealth);
	} else {
		bossHealthBarBg.visible = false;
		bossHealthBar.visible = false;
		bossHealthText.visible = false;
	}
	//Update UI
	healthText.setText('Health: ' + Math.max(0, playerShip.health) + '/' + playerShip.maxHealth);
	var healthPercentage = Math.max(0, playerShip.health / playerShip.maxHealth);
	playerHealthBar.scaleX = healthPercentage;
	if (healthPercentage > 0.5) {
		playerHealthBar.tint = 0x00ff00;
	} else if (healthPercentage > 0.25) {
		playerHealthBar.tint = 0xffff00;
	} else {
		playerHealthBar.tint = 0xff0000;
	}
	upgradeText.setText('Upgrades: ' + playerShip.upgradePoints);
	waveText.setText('Wave: ' + waveNumber + ' | Boss: ' + bossNumber);
};