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

/**** 
* Classes
****/ 
var FireParticle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.6,
		scaleY: 0.6,
		tint: 0xff4500
	});
	self.life = 1.0;
	self.velocityX = 0;
	self.velocityY = 0;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		self.life -= 0.05;
		particleGraphics.alpha = self.life;
		particleGraphics.scaleX = self.life * 0.6;
		particleGraphics.scaleY = self.life * 0.6;
		if (self.life <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	self.speed = 2;
	self.targetX = 2048 / 2;
	self.targetY = 2732 / 2;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 5) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Rotate obstacle continuously as it moves
		obstacleGraphics.rotation += 0.1;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	// Make it look more like a spaceship by rotating it to point upward
	playerGraphics.rotation = -Math.PI * 1.5; // Rotated an additional 90 degrees
	self.speed = 8;
	self.targetX = self.x;
	self.targetY = self.y;
	self.lastX = self.x;
	self.lastY = self.y;
	self.fireParticles = [];
	self.engineSoundPlaying = false;
	self.update = function () {
		// Store last position for movement detection
		self.lastX = self.x;
		self.lastY = self.y;
		// Smooth movement toward target position
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var isMoving = Math.abs(dx) > 1 || Math.abs(dy) > 1;
		if (isMoving) {
			self.x += dx * 0.15;
			self.y += dy * 0.15;
			// Play engine sound when moving
			if (!self.engineSoundPlaying) {
				self.engineSound = LK.getSound('engine');
				self.engineSound.play();
				self.engineSoundPlaying = true;
			}
		} else {
			// Stop engine sound when not moving
			if (self.engineSoundPlaying) {
				if (self.engineSound) {
					self.engineSound.stop();
				}
				self.engineSoundPlaying = false;
			}
		}
		// Calculate angle to center and rotate spaceship to point toward it
		var centerX = 2048 / 2;
		var centerY = 2732 / 2;
		var angleToCenter = Math.atan2(centerY - self.y, centerX - self.x);
		var targetRotation = angleToCenter - Math.PI / 2; // Point toward center
		// Smooth rotation toward target angle using tween
		tween(playerGraphics, {
			rotation: targetRotation
		}, {
			duration: 100,
			easing: tween.easeOut
		});
		// Create fire particles when moving
		if (isMoving) {
			var particle = new FireParticle();
			// Always position particle from the left side of player (consistent side)
			var leftSideOffsetX = -35; // Fixed offset to the left
			var leftSideOffsetY = 0;
			particle.x = self.x + leftSideOffsetX;
			particle.y = self.y + leftSideOffsetY;
			// Add velocity toward the left side (consistent direction)
			particle.velocityX = -2 - Math.random() * 2;
			particle.velocityY = 0;
			// Add some random spread
			particle.velocityX += (Math.random() - 0.5) * 2;
			particle.velocityY += (Math.random() - 0.5) * 2;
			self.fireParticles.push(particle);
			game.addChild(particle);
		}
		// Clean up dead particles
		for (var i = self.fireParticles.length - 1; i >= 0; i--) {
			if (self.fireParticles[i].life <= 0) {
				self.fireParticles.splice(i, 1);
			}
		}
	};
	self.moveTo = function (x, y) {
		// Keep player within central area bounds
		var centerX = 2048 / 2;
		var centerY = 2732 / 2;
		var maxDistance = 400;
		// Always constrain player to move only on the circular path at maxDistance
		var angle = Math.atan2(y - centerY, x - centerX);
		self.targetX = centerX + Math.cos(angle) * maxDistance;
		self.targetY = centerY + Math.sin(angle) * maxDistance;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
var player;
var obstacles = [];
var gameStarted = false;
var spawnTimer = 0;
var spawnRate = 120; // Initial spawn rate (ticks between spawns)
var difficultyTimer = 0;
var baseObstacleSpeed = 2;
// Create center circle indicator
var centerIndicator = LK.getAsset('obstacle', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 3,
	scaleY: 3,
	alpha: 0.1
});
centerIndicator.x = 2048 / 2;
centerIndicator.y = 2732 / 2;
game.addChild(centerIndicator);
// Create player
player = new Player();
player.x = 2048 / 2;
player.y = 2732 / 2;
game.addChild(player);
// Score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game instructions
var instructionTxt = new Text2('Touch to move around the center', {
	size: 60,
	fill: 0xCCCCCC
});
instructionTxt.anchor.set(0.5, 0.5);
instructionTxt.x = 2048 / 2;
instructionTxt.y = 2732 / 2 + 80;
game.addChild(instructionTxt);
function spawnObstacle() {
	var obstacle = new Obstacle();
	// Random spawn position along screen edges
	var edge = Math.floor(Math.random() * 4);
	switch (edge) {
		case 0:
			// Top edge
			obstacle.x = Math.random() * 2048;
			obstacle.y = -50;
			break;
		case 1:
			// Right edge
			obstacle.x = 2048 + 50;
			obstacle.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom edge
			obstacle.x = Math.random() * 2048;
			obstacle.y = 2732 + 50;
			break;
		case 3:
			// Left edge
			obstacle.x = -50;
			obstacle.y = Math.random() * 2732;
			break;
	}
	// Add random size variation to obstacles
	var randomScale = 0.5 + Math.random() * 1.5; // Random scale between 0.5x and 2x
	obstacle.scaleX = randomScale;
	obstacle.scaleY = randomScale;
	// Set speed based on current difficulty
	obstacle.speed = baseObstacleSpeed + difficultyTimer / 3600 * 2; // Increase speed over time
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function checkCollisions() {
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		if (player.intersects(obstacle)) {
			// Game over
			LK.getSound('collision').play();
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
		// Remove obstacles that reach the center
		var distanceToCenter = Math.sqrt((obstacle.x - 2048 / 2) * (obstacle.x - 2048 / 2) + (obstacle.y - 2732 / 2) * (obstacle.y - 2732 / 2));
		if (distanceToCenter < 30) {
			obstacle.destroy();
			obstacles.splice(i, 1);
		}
	}
}
function updateDifficulty() {
	difficultyTimer++;
	// Increase spawn rate every 5 seconds
	if (difficultyTimer % 300 === 0 && spawnRate > 30) {
		spawnRate -= 5;
	}
}
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
		instructionTxt.destroy();
	}
	player.moveTo(x, y);
};
game.move = function (x, y, obj) {
	if (gameStarted) {
		player.moveTo(x, y);
	}
};
game.update = function () {
	if (!gameStarted) return;
	// Update score based on survival time
	var currentScore = Math.floor(LK.ticks / 60); // Score increases every second
	LK.setScore(currentScore);
	scoreTxt.setText(currentScore);
	// Spawn obstacles
	spawnTimer++;
	if (spawnTimer >= spawnRate) {
		spawnObstacle();
		spawnTimer = 0;
	}
	// Update difficulty
	updateDifficulty();
	// Check for collisions
	checkCollisions();
};

===================================================================
--- original.js
+++ change.js
@@ -85,9 +85,8 @@
 			self.y += dy * 0.15;
 			// Play engine sound when moving
 			if (!self.engineSoundPlaying) {
 				self.engineSound = LK.getSound('engine');
-				self.engineSound.loop = true;
 				self.engineSound.play();
 				self.engineSoundPlaying = true;
 			}
 		} else {