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

/**** 
* Classes
****/ 
var Obstacle = Container.expand(function (type) {
	var self = Container.call(this);
	var assetName = 'obstacle' + (type || 1);
	var obstacleGraphics = self.attachAsset(assetName, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Make obstacles translucent
	obstacleGraphics.alpha = 0.6;
	self.speed = -(currentSpeed + Math.random() * 2); // Speed increases over time
	self.update = function () {
		self.x += self.speed;
		// Gentle floating motion
		self.y += Math.sin(LK.ticks * 0.02 + self.x * 0.01) * 0.5;
	};
	return self;
});
var Particle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add glow effect
	particleGraphics.alpha = 0.9;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		// Smooth movement towards target position
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		self.x += dx * 0.15;
		self.y += dy * 0.15;
		// Create trail effect
		if (LK.ticks % 3 === 0) {
			createTrailDot(self.x, self.y);
		}
	};
	return self;
});
var TrailDot = Container.expand(function () {
	var self = Container.call(this);
	var dotGraphics = self.attachAsset('trailDot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.life = 1.0;
	self.fadeSpeed = 0.02;
	self.update = function () {
		self.life -= self.fadeSpeed;
		dotGraphics.alpha = self.life * 0.5;
		dotGraphics.scaleX = self.life;
		dotGraphics.scaleY = self.life;
		if (self.life <= 0) {
			self.destroy();
			for (var i = trailDots.length - 1; i >= 0; i--) {
				if (trailDots[i] === self) {
					trailDots.splice(i, 1);
					break;
				}
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb
});

/**** 
* Game Code
****/ 
// Game variables
var particle;
var obstacles = [];
var trailDots = [];
var backgroundColors = [0x87ceeb, 0x9370db, 0xdda0dd, 0xb19cd9];
var colorIndex = 0;
var colorTimer = 0;
var baseSpeed = 2;
var speedIncrement = 0.01;
var currentSpeed = baseSpeed;
// Add background image
var backgroundImage = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(backgroundImage);
// Create particle
particle = game.addChild(new Particle());
particle.x = 300;
particle.y = 2732 / 2;
particle.targetX = particle.x;
particle.targetY = particle.y;
// Background gradient animation
function updateBackgroundColor() {
	colorTimer++;
	if (colorTimer >= 300) {
		// Change color every 5 seconds at 60fps
		colorTimer = 0;
		colorIndex = (colorIndex + 1) % backgroundColors.length;
		// Smooth color transition
		var currentColor = game.backgroundColor;
		var targetColor = backgroundColors[colorIndex];
		tween(game, {
			backgroundColor: targetColor
		}, {
			duration: 3000,
			easing: tween.easeInOut
		});
	}
}
// Create trail dot function
function createTrailDot(x, y) {
	var dot = new TrailDot();
	dot.x = x + (Math.random() - 0.5) * 10;
	dot.y = y + (Math.random() - 0.5) * 10;
	trailDots.push(dot);
	game.addChild(dot);
}
// Spawn obstacles
function spawnObstacle() {
	var obstacleType = Math.floor(Math.random() * 3) + 1;
	var obstacle = new Obstacle(obstacleType);
	obstacle.x = 2048 + 100;
	obstacle.y = 200 + Math.random() * (2732 - 400); // Keep obstacles within reasonable bounds
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Handle collision with game over
function handleCollision(particle, obstacle) {
	// Flash the screen red briefly before game over
	LK.effects.flashScreen(0xff0000, 500);
	// Show game over after a brief delay
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 300);
}
// Touch/drag controls
game.down = function (x, y, obj) {
	particle.targetX = x;
	particle.targetY = y;
};
game.move = function (x, y, obj) {
	particle.targetX = x;
	particle.targetY = y;
};
// Main game update
game.update = function () {
	updateBackgroundColor();
	// Gradually increase speed over time
	currentSpeed = baseSpeed + LK.ticks * speedIncrement * 0.01;
	// Spawn obstacles periodically
	if (LK.ticks % 120 === 0) {
		// Every 2 seconds
		spawnObstacle();
	}
	// Update and clean up obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		// Remove obstacles that have moved off screen
		if (obstacle.x < -200) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Check collision with particle
		if (particle.intersects(obstacle)) {
			handleCollision(particle, obstacle);
		}
	}
	// Clean up old trail dots (safety check)
	if (trailDots.length > 100) {
		var oldDot = trailDots.shift();
		if (oldDot && oldDot.parent) {
			oldDot.destroy();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -91,8 +91,16 @@
 var colorTimer = 0;
 var baseSpeed = 2;
 var speedIncrement = 0.01;
 var currentSpeed = baseSpeed;
+// Add background image
+var backgroundImage = LK.getAsset('background', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: 0
+});
+game.addChild(backgroundImage);
 // Create particle
 particle = game.addChild(new Particle());
 particle.x = 300;
 particle.y = 2732 / 2;