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

/**** 
* Classes
****/ 
var Aircraft = Container.expand(function (type) {
	var self = Container.call(this);
	self.aircraftType = type || 'basic';
	// Set properties based on aircraft type
	if (self.aircraftType === 'basic') {
		var playerGraphics = self.attachAsset('player', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.speed = 8;
		self.health = 5;
		self.shootRate = 10;
		self.canShootMissiles = false;
	} else if (self.aircraftType === 'fast') {
		var playerGraphics = self.attachAsset('player', {
			anchorX: 0.5,
			anchorY: 0.5,
			tint: 0x00FF00
		});
		self.speed = 12;
		self.health = 4;
		self.shootRate = 8;
		self.canShootMissiles = false;
	} else if (self.aircraftType === 'missile') {
		var playerGraphics = self.attachAsset('player', {
			anchorX: 0.5,
			anchorY: 0.5,
			tint: 0xFF8800
		});
		self.speed = 6;
		self.health = 6;
		self.shootRate = 12;
		self.canShootMissiles = true;
		self.missileTimer = 0;
	}
	self.update = function () {
		// Keep player in bounds - only allow movement along bottom edge
		if (self.x < 40) self.x = 40;
		if (self.x > 2008) self.x = 2008;
		// Force player to stay at bottom of screen
		self.y = 2400;
		// Update missile timer for missile aircraft
		if (self.canShootMissiles) {
			self.missileTimer++;
		}
	};
	return self;
});
var Bomb = Container.expand(function () {
	var self = Container.call(this);
	var bombGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x444444,
		scaleX: 2,
		scaleY: 2
	});
	self.speed = 4;
	self.damage = 2;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	var cloudType = ['cloud1', 'cloud2', 'cloud3'][Math.floor(Math.random() * 3)];
	var cloudGraphics = self.attachAsset(cloudType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	cloudGraphics.alpha = 0.7;
	self.speed = Math.random() * 2 + 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('Po', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.0,
		scaleY: 1.0
	});
	self.speed = 2;
	self.value = 0.5;
	self.update = function () {
		self.y += self.speed;
		// Gentle floating animation
		self.x += Math.sin(LK.ticks * 0.05) * 0.5;
	};
	return self;
});
// Game variables
var Enemy1 = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.health = 1;
	self.scoreValue = 10;
	self.enemyType = 1;
	self.update = function () {
		self.y += self.speed;
		// Adjust shooting frequency based on difficulty and wave
		var shootInterval;
		if (difficulty === 'extreme' && currentWave >= 2) {
			shootInterval = 30; // 2 shots per second (30 ticks = 0.5 seconds at 60fps)
		} else if (difficulty === 'hard' && currentWave >= 3) {
			shootInterval = 90; // 1.5 shots per second (90 ticks = 1.5 seconds at 60fps)
		} else {
			shootInterval = difficulty === 'easy' ? 450 : difficulty === 'medium' ? 300 : 250;
		}
		if (LK.ticks % shootInterval === 0) {
			var enemyBullet = new EnemyBullet();
			enemyBullet.x = self.x;
			enemyBullet.y = self.y + 40;
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		}
		// Adjust bomb frequency based on difficulty
		var bombInterval = difficulty === 'easy' ? 240 : difficulty === 'medium' ? 150 : difficulty === 'hard' ? 120 : 90;
		if (LK.ticks % bombInterval === 0) {
			var bomb = new Bomb();
			bomb.x = self.x;
			bomb.y = self.y + 40;
			bombs.push(bomb);
			game.addChild(bomb);
		}
	};
	return self;
});
var Enemy2 = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.health = 2;
	self.scoreValue = 20;
	self.enemyType = 2;
	self.nextBombTime = 0;
	self.bombInterval = Math.random() * 1500 + 3000; // Random between 3-4.5 seconds
	self.update = function () {
		self.y += self.speed;
		// Zigzag movement
		self.x += Math.sin(LK.ticks * 0.1) * 2;
		// Drop bombs based on difficulty
		var bombTime = difficulty === 'easy' ? 5000 : difficulty === 'medium' ? 3000 : difficulty === 'hard' ? 2500 : 1500;
		if (LK.ticks * 16.67 >= self.nextBombTime) {
			// Convert ticks to milliseconds (60fps = 16.67ms per tick)
			var bomb = new Bomb();
			bomb.x = self.x;
			bomb.y = self.y + 40;
			bombs.push(bomb);
			game.addChild(bomb);
			// Set next bomb time based on difficulty
			var bombVariation = difficulty === 'easy' ? 2000 : difficulty === 'medium' ? 1500 : difficulty === 'hard' ? 1250 : 800;
			self.bombInterval = Math.random() * bombVariation + bombTime;
			self.nextBombTime = LK.ticks * 16.67 + self.bombInterval;
		}
		// Shoot missiles on wave 5+ in hard mode, or wave 3+ in extreme mode
		if (difficulty === 'extreme' && currentWave >= 3 || difficulty === 'hard' && currentWave >= 5) {
			// Extreme mode: shoot missile every 2 seconds, Hard mode: every 4 seconds
			var missileInterval = difficulty === 'extreme' ? 120 : 240;
			if (LK.ticks % missileInterval === 0) {
				var missile = new Missile();
				missile.x = self.x;
				missile.y = self.y + 40;
				missiles.push(missile);
				game.addChild(missile);
			}
		} else {
			// Regular bullet shooting based on difficulty
			var shootInterval = difficulty === 'easy' ? 150 : difficulty === 'medium' ? 90 : difficulty === 'hard' ? 75 : 45;
			if (LK.ticks % shootInterval === 0) {
				var enemyBullet = new EnemyBullet();
				enemyBullet.x = self.x;
				enemyBullet.y = self.y + 40;
				enemyBullet.damage = difficulty === 'easy' ? 0.3 : difficulty === 'medium' ? 0.5 : difficulty === 'hard' ? 0.65 : 1.0;
				enemyBullets.push(enemyBullet);
				game.addChild(enemyBullet);
			}
		}
	};
	return self;
});
var Enemy3 = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.health = 1;
	self.scoreValue = 15;
	self.enemyType = 3;
	self.hasSpottedPlayer = false; // Track if this Enemy3 has already spotted the player
	self.update = function () {
		self.y += self.speed;
		// Scout behavior - scan for player when in range
		var distanceToPlayer = Math.abs(self.x - player.x);
		var verticalDistance = Math.abs(self.y - player.y);
		// If Enemy3 is close enough to "spot" the player (within scanning range)
		if (distanceToPlayer < 300 && verticalDistance < 400 && !self.hasSpottedPlayer) {
			self.hasSpottedPlayer = true;
			// Show warning text
			warningTxt.alpha = 1;
			tween(warningTxt, {
				alpha: 0
			}, {
				duration: 3000
			}); // Fade out warning over 3 seconds
			// Trigger Enemy2 spawn after warning
			LK.setTimeout(function () {
				var enemy2 = new Enemy2();
				enemy2.x = Math.random() * 1900 + 100;
				enemy2.y = -50;
				enemy2.speed += Math.floor(currentWave / 3);
				enemies.push(enemy2);
				game.addChild(enemy2);
			}, 1000); // Spawn Enemy2 1 second after warning appears
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0xff0000
	});
	self.speed = 8;
	self.damage = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0xFFAA00,
		scaleX: 2,
		scaleY: 3
	});
	self.speed = 6;
	self.damage = 3;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.health = 5;
	self.update = function () {
		// Keep player in bounds - only allow movement along bottom edge
		if (self.x < 40) self.x = 40;
		if (self.x > 2008) self.x = 2008;
		// Force player to stay at bottom of screen
		self.y = 2400;
	};
	return self;
});
var PlayerMissile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x00AAFF,
		scaleX: 1.5,
		scaleY: 2
	});
	self.speed = -15;
	self.damage = 3;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var enemies = [];
var bullets = [];
var playerMissiles = [];
var enemyBullets = [];
var bombs = [];
var missiles = [];
var clouds = [];
var coins = [];
var score = 0;
var money = storage.money || 0;
var totalKills = 0;
var enemySpawnTimer = 0;
var cloudSpawnTimer = 0;
var coinSpawnTimer = 0;
var currentWave = 1;
var enemiesSpawnedThisWave = 0;
var enemiesKilledThisWave = 0;
var enemiesPerWave = 5;
var waveInProgress = false;
var waveStartDelay = 0;
var maxEnemySpawnRate = 60;
var difficulty = null; // null, 'easy', 'medium', 'hard'
var gameStarted = false;
var showingShop = false;
var selectedAircraft = storage.selectedAircraft || 'basic';
var ownedAircraft = storage.ownedAircraft || ['basic'];
// Difficulty selection menu
var difficultyTitle = new Text2('Select Difficulty', {
	size: 100,
	fill: 0xFFFFFF
});
difficultyTitle.anchor.set(0.5, 0.5);
difficultyTitle.x = 1024;
difficultyTitle.y = 800;
game.addChild(difficultyTitle);
// Easy button
var easyButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 15,
	scaleY: 8,
	tint: 0x00FF00
});
easyButton.x = 1024;
easyButton.y = 1200;
game.addChild(easyButton);
var easyText = new Text2('EASY', {
	size: 80,
	fill: 0x000000
});
easyText.anchor.set(0.5, 0.5);
easyText.x = 1024;
easyText.y = 1200;
game.addChild(easyText);
// Medium button
var mediumButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 15,
	scaleY: 8,
	tint: 0xFFFF00
});
mediumButton.x = 1024;
mediumButton.y = 1400;
game.addChild(mediumButton);
var mediumText = new Text2('MEDIUM', {
	size: 80,
	fill: 0x000000
});
mediumText.anchor.set(0.5, 0.5);
mediumText.x = 1024;
mediumText.y = 1400;
game.addChild(mediumText);
// Hard button
var hardButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 15,
	scaleY: 8,
	tint: 0xFF0000
});
hardButton.x = 1024;
hardButton.y = 1600;
game.addChild(hardButton);
var hardText = new Text2('HARD', {
	size: 80,
	fill: 0x000000
});
hardText.anchor.set(0.5, 0.5);
hardText.x = 1024;
hardText.y = 1600;
game.addChild(hardText);
// Extreme button
var extremeButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 15,
	scaleY: 8,
	tint: 0x8B0000
});
extremeButton.x = 1024;
extremeButton.y = 1800;
game.addChild(extremeButton);
var extremeText = new Text2('EXTREME', {
	size: 80,
	fill: 0xFFFFFF
});
extremeText.anchor.set(0.5, 0.5);
extremeText.x = 1024;
extremeText.y = 1800;
game.addChild(extremeText);
// Shop button
var shopButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 12,
	scaleY: 6,
	tint: 0x8A2BE2
});
shopButton.x = 1024;
shopButton.y = 2000;
game.addChild(shopButton);
var shopText = new Text2('SHOP', {
	size: 60,
	fill: 0xFFFFFF
});
shopText.anchor.set(0.5, 0.5);
shopText.x = 1024;
shopText.y = 2000;
game.addChild(shopText);
// Shop interface (initially hidden)
var shopTitle = new Text2('AIRCRAFT SHOP', {
	size: 80,
	fill: 0xFFFFFF
});
shopTitle.anchor.set(0.5, 0.5);
shopTitle.x = 1024;
shopTitle.y = 600;
shopTitle.alpha = 0;
game.addChild(shopTitle);
// Basic Aircraft (already owned)
var basicButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 12,
	scaleY: 8,
	tint: 0x666666
});
basicButton.x = 512;
basicButton.y = 1000;
basicButton.alpha = 0;
game.addChild(basicButton);
var basicText = new Text2('BASIC\nOwned', {
	size: 40,
	fill: 0xFFFFFF
});
basicText.anchor.set(0.5, 0.5);
basicText.x = 512;
basicText.y = 1000;
basicText.alpha = 0;
game.addChild(basicText);
// Fast Aircraft
var fastButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 12,
	scaleY: 8,
	tint: 0x00AA00
});
fastButton.x = 1024;
fastButton.y = 1000;
fastButton.alpha = 0;
game.addChild(fastButton);
var fastText = new Text2('FAST\n15.0', {
	size: 40,
	fill: 0xFFFFFF
});
fastText.anchor.set(0.5, 0.5);
fastText.x = 1024;
fastText.y = 1000;
fastText.alpha = 0;
game.addChild(fastText);
// Missile Aircraft
var missileButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 12,
	scaleY: 8,
	tint: 0xFF8800
});
missileButton.x = 1536;
missileButton.y = 1000;
missileButton.alpha = 0;
game.addChild(missileButton);
var missileText = new Text2('MISSILE\n25.0', {
	size: 40,
	fill: 0xFFFFFF
});
missileText.anchor.set(0.5, 0.5);
missileText.x = 1536;
missileText.y = 1000;
missileText.alpha = 0;
game.addChild(missileText);
// Back button for shop
var backButton = LK.getAsset('bullet', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 8,
	scaleY: 6,
	tint: 0xFF0000
});
backButton.x = 1024;
backButton.y = 1400;
backButton.alpha = 0;
game.addChild(backButton);
var backText = new Text2('BACK', {
	size: 50,
	fill: 0xFFFFFF
});
backText.anchor.set(0.5, 0.5);
backText.x = 1024;
backText.y = 1400;
backText.alpha = 0;
game.addChild(backText);
// Initialize background clouds
for (var i = 0; i < 8; i++) {
	var cloud = new Cloud();
	cloud.x = Math.random() * 2048;
	cloud.y = Math.random() * 2732;
	clouds.push(cloud);
	game.addChild(cloud);
}
// Player will be created when game starts after difficulty selection
// Score display
var scoreTxt = new Text2('Score: ' + score, {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(scoreTxt);
scoreTxt.x = 120;
scoreTxt.y = 20;
// Wave display
var waveTxt = new Text2('Wave: ' + currentWave, {
	size: 60,
	fill: 0xFFFF00
});
waveTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(waveTxt);
waveTxt.y = 20;
// Health display
var healthTxt = new Text2('Health: 5', {
	size: 60,
	fill: 0xFF0000
});
healthTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(healthTxt);
healthTxt.x = -20;
healthTxt.y = 20;
// Kills counter display
var killsTxt = new Text2('Kills: ' + totalKills, {
	size: 60,
	fill: 0x00FF00
});
killsTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(killsTxt);
killsTxt.x = -20;
killsTxt.y = 90;
// Money display
var moneyTxt = new Text2('Money: ' + money.toFixed(1), {
	size: 60,
	fill: 0xFFD700
});
moneyTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(moneyTxt);
moneyTxt.x = 120;
moneyTxt.y = 90;
// Warning text (initially hidden)
var warningTxt = new Text2('WARNING', {
	size: 120,
	fill: 0xFF0000
});
warningTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(warningTxt);
warningTxt.alpha = 0; // Initially hidden
// Touch input handling for difficulty selection and player movement
game.down = function (x, y, obj) {
	if (!gameStarted && !showingShop) {
		// Check if easy button was touched
		if (x >= 900 && x <= 1148 && y >= 1136 && y <= 1264) {
			difficulty = 'easy';
			startGame();
		}
		// Check if medium button was touched
		else if (x >= 900 && x <= 1148 && y >= 1336 && y <= 1464) {
			difficulty = 'medium';
			startGame();
		}
		// Check if hard button was touched
		else if (x >= 900 && x <= 1148 && y >= 1536 && y <= 1664) {
			difficulty = 'hard';
			startGame();
		}
		// Check if extreme button was touched
		else if (x >= 900 && x <= 1148 && y >= 1736 && y <= 1864) {
			difficulty = 'extreme';
			startGame();
		}
		// Check if shop button was touched
		else if (x >= 880 && x <= 1168 && y >= 1940 && y <= 2060) {
			showShop();
		}
	} else if (showingShop) {
		// Shop interactions
		// Back button
		if (x >= 920 && x <= 1128 && y >= 1340 && y <= 1460) {
			hideShop();
		}
		// Basic aircraft selection
		else if (x >= 408 && x <= 616 && y >= 940 && y <= 1060) {
			selectAircraft('basic');
		}
		// Fast aircraft purchase/selection
		else if (x >= 920 && x <= 1128 && y >= 940 && y <= 1060) {
			if (ownedAircraft.indexOf('fast') !== -1) {
				selectAircraft('fast');
			} else if (money >= 15.0) {
				purchaseAircraft('fast', 15.0);
			}
		}
		// Missile aircraft purchase/selection
		else if (x >= 1432 && x <= 1640 && y >= 940 && y <= 1060) {
			if (ownedAircraft.indexOf('missile') !== -1) {
				selectAircraft('missile');
			} else if (money >= 25.0) {
				purchaseAircraft('missile', 25.0);
			}
		}
	} else if (gameStarted) {
		// Move player to touch x position, keeping y at bottom
		player.x = x;
	}
};
game.move = function (x, y, obj) {
	if (gameStarted) {
		// Move player to touch x position while dragging
		player.x = x;
	}
};
// Function to start game with selected difficulty
function startGame() {
	gameStarted = true;
	// Remove difficulty selection menu
	difficultyTitle.destroy();
	easyButton.destroy();
	easyText.destroy();
	mediumButton.destroy();
	mediumText.destroy();
	hardButton.destroy();
	hardText.destroy();
	extremeButton.destroy();
	extremeText.destroy();
	shopButton.destroy();
	shopText.destroy();
	// Hide shop interface elements
	shopTitle.destroy();
	basicButton.destroy();
	basicText.destroy();
	fastButton.destroy();
	fastText.destroy();
	missileButton.destroy();
	missileText.destroy();
	backButton.destroy();
	backText.destroy();
	// Create player with selected aircraft
	player = game.addChild(new Aircraft(selectedAircraft));
	player.x = 1024;
	player.y = 2400;
	// Apply difficulty settings
	if (difficulty === 'easy') {
		player.health = 8;
		maxEnemySpawnRate = 80;
		enemiesPerWave = 3;
	} else if (difficulty === 'medium') {
		player.health = 5;
		maxEnemySpawnRate = 60;
		enemiesPerWave = 5;
	} else if (difficulty === 'hard') {
		player.health = 4;
		maxEnemySpawnRate = 50;
		enemiesPerWave = 6;
	} else if (difficulty === 'extreme') {
		player.health = 3;
		maxEnemySpawnRate = 30;
		enemiesPerWave = 8;
	}
	// Update health display
	healthTxt.setText('Health: ' + player.health);
}
function showShop() {
	showingShop = true;
	// Hide difficulty buttons
	difficultyTitle.alpha = 0;
	easyButton.alpha = 0;
	easyText.alpha = 0;
	mediumButton.alpha = 0;
	mediumText.alpha = 0;
	hardButton.alpha = 0;
	hardText.alpha = 0;
	extremeButton.alpha = 0;
	extremeText.alpha = 0;
	shopButton.alpha = 0;
	shopText.alpha = 0;
	// Show shop interface
	shopTitle.alpha = 1;
	basicButton.alpha = 1;
	basicText.alpha = 1;
	fastButton.alpha = 1;
	fastText.alpha = 1;
	missileButton.alpha = 1;
	missileText.alpha = 1;
	backButton.alpha = 1;
	backText.alpha = 1;
	// Update button states based on ownership
	updateShopDisplay();
}
function hideShop() {
	showingShop = false;
	// Show difficulty buttons
	difficultyTitle.alpha = 1;
	easyButton.alpha = 1;
	easyText.alpha = 1;
	mediumButton.alpha = 1;
	mediumText.alpha = 1;
	hardButton.alpha = 1;
	hardText.alpha = 1;
	extremeButton.alpha = 1;
	extremeText.alpha = 1;
	shopButton.alpha = 1;
	shopText.alpha = 1;
	// Hide shop interface
	shopTitle.alpha = 0;
	basicButton.alpha = 0;
	basicText.alpha = 0;
	fastButton.alpha = 0;
	fastText.alpha = 0;
	missileButton.alpha = 0;
	missileText.alpha = 0;
	backButton.alpha = 0;
	backText.alpha = 0;
}
function updateShopDisplay() {
	// Update money display
	moneyTxt.setText('Money: ' + money.toFixed(1));
	// Update aircraft buttons based on ownership and selection
	if (ownedAircraft.indexOf('fast') !== -1) {
		fastText.setText(selectedAircraft === 'fast' ? 'FAST\nSELECTED' : 'FAST\nOwned');
		fastButton.tint = selectedAircraft === 'fast' ? 0xFFFF00 : 0x00AA00;
	} else {
		fastText.setText('FAST\n15.0');
		fastButton.tint = money >= 15.0 ? 0x00AA00 : 0x555555;
	}
	if (ownedAircraft.indexOf('missile') !== -1) {
		missileText.setText(selectedAircraft === 'missile' ? 'MISSILE\nSELECTED' : 'MISSILE\nOwned');
		missileButton.tint = selectedAircraft === 'missile' ? 0xFFFF00 : 0xFF8800;
	} else {
		missileText.setText('MISSILE\n25.0');
		missileButton.tint = money >= 25.0 ? 0xFF8800 : 0x555555;
	}
	// Basic aircraft
	basicText.setText(selectedAircraft === 'basic' ? 'BASIC\nSELECTED' : 'BASIC\nOwned');
	basicButton.tint = selectedAircraft === 'basic' ? 0xFFFF00 : 0x666666;
}
function purchaseAircraft(type, cost) {
	if (money >= cost) {
		money -= cost;
		ownedAircraft.push(type);
		selectedAircraft = type;
		// Save to storage
		storage.money = money;
		storage.ownedAircraft = ownedAircraft;
		storage.selectedAircraft = selectedAircraft;
		// Update display
		updateShopDisplay();
		// Visual feedback
		LK.effects.flashScreen(0x00FF00, 300);
	}
}
function selectAircraft(type) {
	if (ownedAircraft.indexOf(type) !== -1) {
		selectedAircraft = type;
		storage.selectedAircraft = selectedAircraft;
		updateShopDisplay();
	}
}
// Main game loop
game.update = function () {
	if (!gameStarted) return;
	// Spawn new clouds
	cloudSpawnTimer++;
	if (cloudSpawnTimer > 120) {
		var cloud = new Cloud();
		cloud.x = Math.random() * 2048;
		cloud.y = -100;
		clouds.push(cloud);
		game.addChild(cloud);
		cloudSpawnTimer = 0;
	}
	// Spawn coins randomly
	coinSpawnTimer++;
	if (coinSpawnTimer > 180) {
		// Spawn coin every 3 seconds
		var coin = new Coin();
		coin.x = Math.random() * 1800 + 124; // Keep away from edges
		coin.y = -50;
		coins.push(coin);
		game.addChild(coin);
		coinSpawnTimer = 0;
	}
	// Update clouds
	for (var i = clouds.length - 1; i >= 0; i--) {
		var cloud = clouds[i];
		if (cloud.y > 2800) {
			cloud.destroy();
			clouds.splice(i, 1);
		}
	}
	// Shooting based on aircraft shoot rate
	if (LK.ticks % player.shootRate === 0) {
		var bullet = new Bullet();
		bullet.x = player.x; // Spawn bullet at player's exact x position
		bullet.y = player.y - 60; // Spawn bullet slightly above player
		bullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	}
	// Missile shooting for missile aircraft
	if (player.canShootMissiles && player.missileTimer >= 90) {
		// Every 1.5 seconds
		var playerMissile = new PlayerMissile();
		playerMissile.x = player.x;
		playerMissile.y = player.y - 60;
		playerMissiles.push(playerMissile);
		game.addChild(playerMissile);
		player.missileTimer = 0;
	}
	// Wave system - spawn enemies based on current wave (infinite waves)
	if (!waveInProgress && waveStartDelay <= 0) {
		// Start new wave
		waveInProgress = true;
		enemiesSpawnedThisWave = 0;
		enemiesKilledThisWave = 0;
		// Infinite waves - enemies per wave increases indefinitely
		enemiesPerWave = 5 + currentWave * 2; // Increase enemies per wave indefinitely
		maxEnemySpawnRate = Math.max(15, 60 - currentWave * 2); // Faster spawning each wave, minimum 15 ticks
		waveTxt.setText('Wave: ' + currentWave);
	}
	if (waveInProgress && enemiesSpawnedThisWave < enemiesPerWave) {
		enemySpawnTimer++;
		if (enemySpawnTimer > maxEnemySpawnRate) {
			// Randomly choose enemy type
			var enemyType = Math.floor(Math.random() * 3) + 1;
			var enemy;
			if (enemyType === 1) {
				enemy = new Enemy1();
			} else if (enemyType === 2) {
				enemy = new Enemy2();
			} else {
				enemy = new Enemy3();
			}
			enemy.x = Math.random() * 1900 + 100;
			enemy.y = -50;
			// Make enemies faster in later waves
			enemy.speed += Math.floor(currentWave / 3);
			enemies.push(enemy);
			game.addChild(enemy);
			enemySpawnTimer = 0;
			enemiesSpawnedThisWave++;
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Remove bullets that are off screen
		if (bullet.y < -50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Damage enemy
				enemy.health -= bullet.damage;
				bullet.destroy();
				bullets.splice(i, 1);
				// Check if enemy is destroyed
				if (enemy.health <= 0) {
					LK.getSound('explosion').play();
					// Create explosion visual at enemy position
					var explosion = LK.getAsset('Bomm', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					explosion.x = enemy.x;
					explosion.y = enemy.y;
					game.addChild(explosion);
					// Animate explosion - scale up and fade out
					tween(explosion, {
						scaleX: 3,
						scaleY: 3,
						alpha: 0
					}, {
						duration: 800,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							explosion.destroy();
						}
					});
					enemy.destroy();
					enemies.splice(j, 1);
					// Update score based on enemy type and wave
					score += enemy.scoreValue * currentWave;
					LK.setScore(score);
					scoreTxt.setText('Score: ' + score);
					// Update kills counter
					totalKills++;
					killsTxt.setText('Kills: ' + totalKills);
					enemiesKilledThisWave++;
					// Check if wave is complete - continue infinitely
					if (waveInProgress && enemiesKilledThisWave >= enemiesPerWave) {
						waveInProgress = false;
						currentWave++;
						waveStartDelay = 180; // 3 second delay between waves
						LK.effects.flashScreen(0x00ff00, 500); // Green flash for wave complete
						// Show wave completed text - infinite progression
						var waveCompletedTxt = new Text2('WAVE ' + (currentWave - 1) + ' COMPLETED!', {
							size: 120,
							fill: 0x00FF00
						});
						waveCompletedTxt.anchor.set(0.5, 0.5);
						LK.gui.center.addChild(waveCompletedTxt);
						// Animate wave completed text - scale up and fade in, then fade out
						waveCompletedTxt.alpha = 0;
						waveCompletedTxt.scaleX = 0.5;
						waveCompletedTxt.scaleY = 0.5;
						tween(waveCompletedTxt, {
							alpha: 1,
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 800,
							easing: tween.bounceOut,
							onFinish: function onFinish() {
								// Hold the text for a moment, then fade out
								LK.setTimeout(function () {
									tween(waveCompletedTxt, {
										alpha: 0
									}, {
										duration: 1000,
										onFinish: function onFinish() {
											waveCompletedTxt.destroy();
										}
									});
								}, 1000);
							}
						});
					}
				} else {
					// Enemy damaged but not destroyed - flash red
					LK.effects.flashObject(enemy, 0xff0000, 200);
				}
				break;
			}
		}
	}
	// Update player missiles
	for (var i = playerMissiles.length - 1; i >= 0; i--) {
		var playerMissile = playerMissiles[i];
		// Remove missiles that are off screen
		if (playerMissile.y < -50) {
			playerMissile.destroy();
			playerMissiles.splice(i, 1);
			continue;
		}
		// Check missile-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (playerMissile.intersects(enemy)) {
				// Damage enemy
				enemy.health -= playerMissile.damage;
				playerMissile.destroy();
				playerMissiles.splice(i, 1);
				// Check if enemy is destroyed
				if (enemy.health <= 0) {
					LK.getSound('explosion').play();
					// Create explosion visual at enemy position
					var explosion = LK.getAsset('Bomm', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					explosion.x = enemy.x;
					explosion.y = enemy.y;
					game.addChild(explosion);
					// Animate explosion - scale up and fade out
					tween(explosion, {
						scaleX: 3,
						scaleY: 3,
						alpha: 0
					}, {
						duration: 800,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							explosion.destroy();
						}
					});
					enemy.destroy();
					enemies.splice(j, 1);
					// Update score based on enemy type and wave
					score += enemy.scoreValue * currentWave;
					LK.setScore(score);
					scoreTxt.setText('Score: ' + score);
					// Update kills counter
					totalKills++;
					killsTxt.setText('Kills: ' + totalKills);
					enemiesKilledThisWave++;
					// Check if wave is complete - continue infinitely
					if (waveInProgress && enemiesKilledThisWave >= enemiesPerWave) {
						waveInProgress = false;
						currentWave++;
						waveStartDelay = 180; // 3 second delay between waves
						LK.effects.flashScreen(0x00ff00, 500); // Green flash for wave complete
						// Show wave completed text - infinite progression
						var waveCompletedTxt = new Text2('WAVE ' + (currentWave - 1) + ' COMPLETED!', {
							size: 120,
							fill: 0x00FF00
						});
						waveCompletedTxt.anchor.set(0.5, 0.5);
						LK.gui.center.addChild(waveCompletedTxt);
						// Animate wave completed text - scale up and fade in, then fade out
						waveCompletedTxt.alpha = 0;
						waveCompletedTxt.scaleX = 0.5;
						waveCompletedTxt.scaleY = 0.5;
						tween(waveCompletedTxt, {
							alpha: 1,
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 800,
							easing: tween.bounceOut,
							onFinish: function onFinish() {
								// Hold the text for a moment, then fade out
								LK.setTimeout(function () {
									tween(waveCompletedTxt, {
										alpha: 0
									}, {
										duration: 1000,
										onFinish: function onFinish() {
											waveCompletedTxt.destroy();
										}
									});
								}, 1000);
							}
						});
					}
				} else {
					// Enemy damaged but not destroyed - flash red
					LK.effects.flashObject(enemy, 0xff0000, 200);
				}
				break;
			}
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		// Remove enemies that are off screen
		if (enemy.y > 2800) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check enemy-player collision
		if (enemy.intersects(player)) {
			player.health--;
			healthTxt.setText('Health: ' + player.health);
			if (player.health <= 0) {
				// Save money before game over
				storage.money = money;
				LK.showGameOver();
			} else {
				LK.effects.flashObject(player, 0xff0000, 500);
			}
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var enemyBullet = enemyBullets[i];
		// Remove bullets that are off screen
		if (enemyBullet.y > 2800) {
			enemyBullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check enemy bullet-player collision
		if (enemyBullet.intersects(player)) {
			player.health -= enemyBullet.damage;
			healthTxt.setText('Health: ' + player.health);
			enemyBullet.destroy();
			enemyBullets.splice(i, 1);
			if (player.health <= 0) {
				// Save money before game over
				storage.money = money;
				LK.showGameOver();
			} else {
				LK.effects.flashObject(player, 0xff0000, 500);
			}
		}
	}
	// Update bombs
	for (var i = bombs.length - 1; i >= 0; i--) {
		var bomb = bombs[i];
		// Remove bombs that are off screen
		if (bomb.y > 2800) {
			bomb.destroy();
			bombs.splice(i, 1);
			continue;
		}
		// Check bomb-player collision
		if (bomb.intersects(player)) {
			player.health -= bomb.damage;
			healthTxt.setText('Health: ' + player.health);
			bomb.destroy();
			bombs.splice(i, 1);
			if (player.health <= 0) {
				// Save money before game over
				storage.money = money;
				LK.showGameOver();
			} else {
				LK.effects.flashObject(player, 0xff0000, 500);
			}
		}
	}
	// Update missiles
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		// Remove missiles that are off screen
		if (missile.y > 2800) {
			missile.destroy();
			missiles.splice(i, 1);
			continue;
		}
		// Check missile-player collision
		if (missile.intersects(player)) {
			player.health -= missile.damage;
			healthTxt.setText('Health: ' + player.health);
			missile.destroy();
			missiles.splice(i, 1);
			if (player.health <= 0) {
				// Save money before game over
				storage.money = money;
				LK.showGameOver();
			} else {
				LK.effects.flashObject(player, 0xff0000, 500);
			}
		}
	}
	// Update coins
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		// Remove coins that are off screen
		if (coin.y > 2800) {
			coin.destroy();
			coins.splice(i, 1);
			continue;
		}
		// Check coin-player collision
		if (coin.intersects(player)) {
			money += coin.value;
			// Add bonus score based on difficulty level
			var coinPoints = 0.5; // Default for easy
			if (difficulty === 'medium') {
				coinPoints = 1.0;
			} else if (difficulty === 'hard') {
				coinPoints = 1.5;
			} else if (difficulty === 'extreme') {
				coinPoints = 2.5;
			}
			score += coinPoints;
			LK.setScore(score);
			scoreTxt.setText('Score: ' + score);
			moneyTxt.setText('Money: ' + money.toFixed(1));
			// Visual effect for coin collection
			LK.effects.flashObject(coin, 0xFFD700, 200);
			coin.destroy();
			coins.splice(i, 1);
		}
	}
	// Handle wave start delay
	if (waveStartDelay > 0) {
		waveStartDelay--;
	}
	// Check if player failed to eliminate all enemies (game over condition)
	// If enemies reach the bottom of the screen without being destroyed, it's game over
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.y > 2600) {
			// Enemy reached near bottom of screen
			// Save money before game over
			storage.money = money;
			LK.showGameOver();
			break;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -1208,10 +1208,18 @@
 		}
 		// Check coin-player collision
 		if (coin.intersects(player)) {
 			money += coin.value;
-			// Add bonus score based on money collected (0.5 for each coin)
-			score += money * 0.5;
+			// Add bonus score based on difficulty level
+			var coinPoints = 0.5; // Default for easy
+			if (difficulty === 'medium') {
+				coinPoints = 1.0;
+			} else if (difficulty === 'hard') {
+				coinPoints = 1.5;
+			} else if (difficulty === 'extreme') {
+				coinPoints = 2.5;
+			}
+			score += coinPoints;
 			LK.setScore(score);
 			scoreTxt.setText('Score: ' + score);
 			moneyTxt.setText('Money: ' + money.toFixed(1));
 			// Visual effect for coin collection