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

/**** 
* Classes
****/ 
var Button = Container.expand(function () {
	var self = Container.call(this);
	// Create button
	var buttonShape = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 100,
		height: 100
	});
	// Text for button
	var buttonText = new Text2('', {
		size: 50,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	self.addChild(buttonText);
	// Setup button
	self.setup = function (text, color) {
		buttonText.setText(text);
		buttonShape.tint = color || 0x444444;
	};
	// Event handlers
	self.down = function (x, y, obj) {
		buttonShape.alpha = 0.7;
		if (self.onPress) {
			self.onPress();
		}
	};
	self.up = function (x, y, obj) {
		buttonShape.alpha = 1;
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	// Create coin sprite
	var coinSprite = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add spinning animation
	self.update = function () {
		coinSprite.rotation += 0.05;
	};
	// Collect animation
	self.collect = function () {
		// Play collection sound
		LK.getSound('coin').play();
		// Animate coin collection
		tween(self, {
			scaleX: 0,
			scaleY: 0,
			alpha: 0
		}, {
			duration: 300,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	// Create enemy sprite
	var enemySprite = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Physics and behavior properties
	self.vx = -2; // Initial direction
	self.patrolDistance = 300;
	self.startX = 0;
	// Initialize patrol points
	self.setup = function (startX) {
		self.startX = startX;
		self.leftBound = startX - self.patrolDistance / 2;
		self.rightBound = startX + self.patrolDistance / 2;
		self.x = startX;
	};
	// Update enemy behavior
	self.update = function () {
		// Move horizontally
		self.x += self.vx;
		// Change direction if reached patrol bounds
		if (self.x <= self.leftBound) {
			self.vx = Math.abs(self.vx);
		} else if (self.x >= self.rightBound) {
			self.vx = -Math.abs(self.vx);
		}
	};
	return self;
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	// Create hero sprite
	var heroSprite = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Physics properties
	self.vx = 0;
	self.vy = 0;
	self.onGround = false;
	self.jumpForce = -20;
	self.gravity = 1;
	self.maxVy = 20;
	self.speed = 10;
	self.health = 3;
	// Flag to track if hero is moving
	self.isMovingRight = false;
	self.isMovingLeft = false;
	// Used to track if jump button is pressed
	self.isJumping = false;
	// Update hero physics
	self.update = function () {
		// Apply movement based on direction
		if (self.isMovingRight) {
			self.vx = self.speed;
		} else if (self.isMovingLeft) {
			self.vx = -self.speed;
		} else {
			self.vx = 0;
		}
		// Apply gravity
		if (!self.onGround) {
			self.vy += self.gravity;
			if (self.vy > self.maxVy) {
				self.vy = self.maxVy;
			}
		}
		// Update position
		self.x += self.vx;
		self.y += self.vy;
		// Reset onGround flag every frame
		// Will be set to true during collision detection if applicable
		self.onGround = false;
	};
	// Handle jump
	self.jump = function () {
		if (self.onGround) {
			self.vy = self.jumpForce;
			self.onGround = false;
			LK.getSound('jump').play();
		}
	};
	// Handle collision with platforms
	self.handlePlatformCollision = function (platform) {
		// Get bounding boxes
		var heroBox = {
			x: self.x - heroSprite.width / 2,
			y: self.y - heroSprite.height / 2,
			width: heroSprite.width,
			height: heroSprite.height
		};
		var platformBox = {
			x: platform.x - platform.width / 2,
			y: platform.y - platform.height / 2,
			width: platform.width,
			height: platform.height
		};
		// Calculate overlap
		var overlapX = Math.max(0, Math.min(heroBox.x + heroBox.width, platformBox.x + platformBox.width) - Math.max(heroBox.x, platformBox.x));
		var overlapY = Math.max(0, Math.min(heroBox.y + heroBox.height, platformBox.y + platformBox.height) - Math.max(heroBox.y, platformBox.y));
		// Handle collision if there is overlap
		if (overlapX > 0 && overlapY > 0) {
			// Determine if collision is more horizontal or vertical
			if (overlapX > overlapY) {
				// Vertical collision
				// Coming from above
				if (heroBox.y + heroBox.height / 2 < platformBox.y + platformBox.height / 2) {
					self.y = platformBox.y - heroBox.height / 2;
					self.vy = 0;
					self.onGround = true;
				}
				// Coming from below
				else if (self.vy < 0) {
					self.y = platformBox.y + platformBox.height + heroBox.height / 2;
					self.vy = 0;
				}
			} else {
				// Horizontal collision
				if (heroBox.x + heroBox.width / 2 < platformBox.x + platformBox.width / 2) {
					self.x = platformBox.x - heroBox.width / 2;
				} else {
					self.x = platformBox.x + platformBox.width + heroBox.width / 2;
				}
				self.vx = 0;
			}
			return true;
		}
		return false;
	};
	// Handle damage
	self.takeDamage = function () {
		if (!self.invulnerable) {
			self.health--;
			self.invulnerable = true;
			// Flash effect
			LK.effects.flashObject(self, 0xFF0000, 1000);
			// Make vulnerable again after 1.5 seconds
			LK.setTimeout(function () {
				self.invulnerable = false;
			}, 1500);
			// Play hit sound
			LK.getSound('hit').play();
			// Check for game over
			if (self.health <= 0) {
				LK.showGameOver();
			}
		}
	};
	return self;
});
var Platform = Container.expand(function () {
	var self = Container.call(this);
	// Create platform sprite
	var platformSprite = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 // Always backgroundColor is black
});

/**** 
* Game Code
****/ 
// Background music
// Sound effects
// Collectible assets
// Character assets
// Platform assets
// Game state variables
var hero;
var platforms = [];
var enemies = [];
var coins = [];
var level = 1;
var score = 0;
var cameraOffset = 0;
var gameStarted = false;
var leftButton;
var rightButton;
var jumpButton;
// UI elements
var scoreTxt;
var levelTxt;
var healthTxt;
// Level configuration
var levelConfig = {
	// Platform configurations for different levels
	platforms: [
	// Level 1
	[{
		x: 300,
		y: 2500
	}, {
		x: 600,
		y: 2300
	}, {
		x: 900,
		y: 2100
	}, {
		x: 1200,
		y: 2300
	}, {
		x: 1500,
		y: 2100
	}, {
		x: 1800,
		y: 1900
	}, {
		x: 300,
		y: 1700
	}, {
		x: 600,
		y: 1500
	}, {
		x: 1200,
		y: 1500
	}, {
		x: 1800,
		y: 1300
	}, {
		x: 300,
		y: 1100
	}, {
		x: 600,
		y: 900
	}, {
		x: 900,
		y: 700
	}, {
		x: 1200,
		y: 500
	}, {
		x: 1500,
		y: 300
	}, {
		x: 1800,
		y: 100
	}]],
	// Enemy configurations
	enemies: [
	// Level 1
	[{
		x: 900,
		y: 2070
	}, {
		x: 1500,
		y: 2070
	}, {
		x: 600,
		y: 1470
	}, {
		x: 1200,
		y: 1470
	}, {
		x: 900,
		y: 670
	}]],
	// Coin configurations
	coins: [
	// Level 1
	[{
		x: 300,
		y: 2450
	}, {
		x: 600,
		y: 2250
	}, {
		x: 900,
		y: 2050
	}, {
		x: 1200,
		y: 2250
	}, {
		x: 1500,
		y: 2050
	}, {
		x: 1800,
		y: 1850
	}, {
		x: 300,
		y: 1650
	}, {
		x: 600,
		y: 1450
	}, {
		x: 1200,
		y: 1450
	}, {
		x: 1800,
		y: 1250
	}, {
		x: 300,
		y: 1050
	}, {
		x: 600,
		y: 850
	}, {
		x: 900,
		y: 650
	}, {
		x: 1200,
		y: 450
	}, {
		x: 1500,
		y: 250
	}, {
		x: 1800,
		y: 50
	}]]
};
// Initialize level
function setupLevel() {
	// Clear existing objects
	clearLevel();
	// Create ground
	var ground = new Platform();
	ground.x = 2048 / 2;
	ground.y = 2732 - 40;
	game.addChild(ground);
	platforms.push(ground);
	// Create platforms
	var levelPlatforms = levelConfig.platforms[level - 1] || levelConfig.platforms[0];
	for (var i = 0; i < levelPlatforms.length; i++) {
		var platform = new Platform();
		platform.x = levelPlatforms[i].x;
		platform.y = levelPlatforms[i].y;
		game.addChild(platform);
		platforms.push(platform);
	}
	// Create enemies
	var levelEnemies = levelConfig.enemies[level - 1] || levelConfig.enemies[0];
	for (var i = 0; i < levelEnemies.length; i++) {
		var enemy = new Enemy();
		enemy.setup(levelEnemies[i].x);
		enemy.y = levelEnemies[i].y;
		game.addChild(enemy);
		enemies.push(enemy);
	}
	// Create coins
	var levelCoins = levelConfig.coins[level - 1] || levelConfig.coins[0];
	for (var i = 0; i < levelCoins.length; i++) {
		var coin = new Coin();
		coin.x = levelCoins[i].x;
		coin.y = levelCoins[i].y;
		game.addChild(coin);
		coins.push(coin);
	}
	// Create hero
	hero = new Hero();
	hero.x = 200;
	hero.y = 2600;
	game.addChild(hero);
	// Update score display
	updateUI();
}
// Clear all level objects
function clearLevel() {
	// Remove platforms
	for (var i = platforms.length - 1; i >= 0; i--) {
		platforms[i].destroy();
	}
	platforms = [];
	// Remove enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].destroy();
	}
	enemies = [];
	// Remove coins
	for (var i = coins.length - 1; i >= 0; i--) {
		coins[i].destroy();
	}
	coins = [];
	// Remove hero if exists
	if (hero) {
		hero.destroy();
		hero = null;
	}
}
// Update UI displays
function updateUI() {
	scoreTxt.setText("Score: " + score);
	levelTxt.setText("Level: " + level);
	healthTxt.setText("Health: " + (hero ? hero.health : 0));
}
// Setup controls
function setupControls() {
	// Left movement button
	leftButton = new Button();
	leftButton.setup("<", 0x4444FF);
	leftButton.x = 150;
	leftButton.y = 2532;
	leftButton.onPress = function () {
		hero.isMovingLeft = true;
		hero.isMovingRight = false;
	};
	leftButton.up = function () {
		hero.isMovingLeft = false;
	};
	game.addChild(leftButton);
	// Right movement button
	rightButton = new Button();
	rightButton.setup(">", 0x4444FF);
	rightButton.x = 300;
	rightButton.y = 2532;
	rightButton.onPress = function () {
		hero.isMovingRight = true;
		hero.isMovingLeft = false;
	};
	rightButton.up = function () {
		hero.isMovingRight = false;
	};
	game.addChild(rightButton);
	// Jump button
	jumpButton = new Button();
	jumpButton.setup("^", 0xFF4444);
	jumpButton.x = 1748;
	jumpButton.y = 2532;
	jumpButton.onPress = function () {
		hero.jump();
	};
	game.addChild(jumpButton);
}
// Setup UI
function setupUI() {
	// Score display
	scoreTxt = new Text2("Score: 0", {
		size: 60,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0, 0);
	LK.gui.topRight.addChild(scoreTxt);
	// Level display
	levelTxt = new Text2("Level: 1", {
		size: 60,
		fill: 0xFFFFFF
	});
	levelTxt.anchor.set(0.5, 0);
	LK.gui.top.addChild(levelTxt);
	// Health display
	healthTxt = new Text2("Health: 3", {
		size: 60,
		fill: 0xFFFFFF
	});
	healthTxt.anchor.set(1, 0);
	LK.gui.topLeft.addChild(healthTxt);
	healthTxt.x = 150; // Move away from top left corner as per guidelines
}
// Initialize game
function initGame() {
	// Set score to zero
	score = 0;
	LK.setScore(0);
	// Setup UI elements
	setupUI();
	// Setup level
	setupLevel();
	// Setup controls
	setupControls();
	// Play background music
	LK.playMusic('bgmusic', {
		fade: {
			start: 0,
			end: 0.7,
			duration: 1000
		}
	});
	// Mark game as started
	gameStarted = true;
}
// Handle collisions
function handleCollisions() {
	// Hero-platform collisions
	for (var i = 0; i < platforms.length; i++) {
		hero.handlePlatformCollision(platforms[i]);
	}
	// Hero-enemy collisions
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (hero.intersects(enemies[i])) {
			// Check if hero is jumping on enemy from above
			if (hero.vy > 0 && hero.y < enemies[i].y - 30) {
				// Destroy enemy
				enemies[i].destroy();
				enemies.splice(i, 1);
				// Bounce hero
				hero.vy = hero.jumpForce * 0.6;
				// Add score
				score += 100;
				LK.setScore(score);
				updateUI();
			} else {
				// Hero takes damage
				hero.takeDamage();
				updateUI();
			}
		}
	}
	// Hero-coin collisions
	for (var i = coins.length - 1; i >= 0; i--) {
		if (hero.intersects(coins[i])) {
			// Collect coin
			coins[i].collect();
			coins.splice(i, 1);
			// Add score
			score += 10;
			LK.setScore(score);
			updateUI();
		}
	}
	// Check for level completion (all coins collected)
	if (coins.length === 0) {
		// Level completed
		level++;
		// Check if player completed all levels
		if (level > levelConfig.platforms.length) {
			// Game completed
			LK.showYouWin();
		} else {
			// Setup next level
			setupLevel();
		}
	}
}
// Keep hero within bounds
function enforceWorldBounds() {
	// Keep hero within horizontal bounds
	if (hero.x < 50) {
		hero.x = 50;
	} else if (hero.x > 2048 - 50) {
		hero.x = 2048 - 50;
	}
	// Check if hero fell off the bottom
	if (hero.y > 2732 + 100) {
		hero.takeDamage();
		// Reset position
		hero.x = 200;
		hero.y = 2600;
		hero.vx = 0;
		hero.vy = 0;
		updateUI();
	}
	// Check if hero reached the top (level complete)
	if (hero.y < 0) {
		// Level completed
		level++;
		// Check if player completed all levels
		if (level > levelConfig.platforms.length) {
			// Game completed
			LK.showYouWin();
		} else {
			// Setup next level
			setupLevel();
		}
	}
}
// Handle global touch events
game.down = function (x, y, obj) {
	if (!gameStarted) {
		initGame();
	}
};
// Game update loop
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update hero
	if (hero) {
		hero.update();
	}
	// Update enemies
	for (var i = 0; i < enemies.length; i++) {
		enemies[i].update();
	}
	// Update coins
	for (var i = 0; i < coins.length; i++) {
		coins[i].update();
	}
	// Handle collisions
	handleCollisions();
	// Enforce world boundaries
	enforceWorldBounds();
};
// Setup initial "tap to start" message
var startText = new Text2("Tap to Start", {
	size: 100,
	fill: 0xFFFFFF
});
startText.anchor.set(0.5, 0.5);
startText.x = 2048 / 2;
startText.y = 2732 / 2;
game.addChild(startText);
// Remove start text when game starts
LK.setInterval(function () {
	if (gameStarted && startText.parent) {
		startText.destroy();
	}
}, 100);

===================================================================
--- original.js
+++ change.js
@@ -235,9 +235,9 @@
 /**** 
 * Initialize Game
 ****/ 
 var game = new LK.Game({
-	backgroundColor: 0x87CEEB // Sky blue background
+	backgroundColor: 0x000000 // Always backgroundColor is black
 });
 
 /**** 
 * Game Code