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

/**** 
* Classes
****/ 
var Asteroid = Container.expand(function (size) {
	var self = Container.call(this);
	// Size can be 0 (small), 1 (medium), or 2 (large)
	self.size = size || 2;
	// Create a container for the asteroid
	var asteroidGraphics = new Container();
	self.addChild(asteroidGraphics);
	// Determine asteroid size
	var radius;
	if (self.size === 0) {
		radius = 16; // small
	} else if (self.size === 1) {
		radius = 32; // medium
	} else {
		radius = 64; // large
	}
	// Create a pixel art circle (asteroid)
	var pixelSize = 4; // Size of each "pixel"
	var pixelGap = 1; // Gap between pixels for hollow effect
	var steps = 16; // Number of points around the circle
	// Draw a circle of pixels
	for (var i = 0; i < steps; i++) {
		var angle = i / steps * Math.PI * 2;
		var px = Math.cos(angle) * radius;
		var py = Math.sin(angle) * radius;
		var pixel = LK.getAsset('asteroidLarge', {
			anchorX: 0.5,
			anchorY: 0.5,
			width: pixelSize - pixelGap,
			height: pixelSize - pixelGap,
			x: px,
			y: py
		});
		asteroidGraphics.addChild(pixel);
	}
	// Random velocity
	var speed = (3 - self.size) * 0.8 + 0.5; // Smaller asteroids move faster
	var angle = Math.random() * Math.PI * 2;
	self.velocity = {
		x: Math.cos(angle) * speed,
		y: Math.sin(angle) * speed
	};
	// Random rotation
	self.rotationSpeed = (Math.random() - 0.5) * 0.05;
	self.update = function () {
		// Move
		self.x += self.velocity.x;
		self.y += self.velocity.y;
		// Rotate
		asteroidGraphics.rotation += self.rotationSpeed;
		// Wrap around screen edges
		if (self.x < -50) {
			self.x = 2098;
		}
		if (self.x > 2098) {
			self.x = -50;
		}
		if (self.y < -50) {
			self.y = 2782;
		}
		if (self.y > 2782) {
			self.y = -50;
		}
	};
	self.getPoints = function () {
		return (3 - self.size) * 100; // Small: 300, Medium: 200, Large: 100
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	// Create a container for pixel art bullet
	var bulletGraphics = new Container();
	self.addChild(bulletGraphics);
	// Create a small pixel art square (bullet)
	var bulletSize = 8;
	var pixelSize = 2; // Size of each "pixel"
	var pixelGap = 1; // Gap between pixels for hollow effect
	// Draw the outline of the square
	var points = [{
		x: -bulletSize / 2,
		y: -bulletSize / 2
	},
	// Top left
	{
		x: bulletSize / 2,
		y: -bulletSize / 2
	},
	// Top right
	{
		x: bulletSize / 2,
		y: bulletSize / 2
	},
	// Bottom right
	{
		x: -bulletSize / 2,
		y: bulletSize / 2
	} // Bottom left
	];
	// Draw the square outline
	for (var i = 0; i < 4; i++) {
		var startPoint = points[i];
		var endPoint = points[(i + 1) % 4];
		// Calculate steps
		var dx = endPoint.x - startPoint.x;
		var dy = endPoint.y - startPoint.y;
		var steps = Math.max(Math.abs(dx), Math.abs(dy)) / pixelSize;
		// Draw pixels along the line
		for (var step = 0; step <= steps; step++) {
			var px = startPoint.x + dx * (step / steps);
			var py = startPoint.y + dy * (step / steps);
			var pixel = LK.getAsset('bulletShape', {
				anchorX: 0.5,
				anchorY: 0.5,
				width: pixelSize - pixelGap,
				height: pixelSize - pixelGap,
				x: px,
				y: py
			});
			bulletGraphics.addChild(pixel);
		}
	}
	self.speed = 10;
	self.velocity = {
		x: 0,
		y: 0
	};
	self.lifespan = 60; // 1 second at 60fps
	self.age = 0;
	self.update = function () {
		self.x += self.velocity.x;
		self.y += self.velocity.y;
		self.age++;
		// Wrap around screen edges
		if (self.x < 0) {
			self.x = 2048;
		}
		if (self.x > 2048) {
			self.x = 0;
		}
		if (self.y < 0) {
			self.y = 2732;
		}
		if (self.y > 2732) {
			self.y = 0;
		}
	};
	return self;
});
var Button = Container.expand(function (assetId) {
	var self = Container.call(this);
	// Create button as a solid shape
	var buttonGraphics = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	buttonGraphics.alpha = 0.5;
	// Determine button shape based on assetId
	var isCircle = assetId === 'fireButton' || assetId === 'forwardButton';
	var buttonSize = 60; // Radius or half-width
	self.isPressed = false;
	self.down = function (x, y, obj) {
		self.isPressed = true;
		buttonGraphics.alpha = 0.8;
	};
	self.up = function (x, y, obj) {
		self.isPressed = false;
		buttonGraphics.alpha = 0.5;
	};
	return self;
});
var Ship = Container.expand(function () {
	var self = Container.call(this);
	// Create a custom triangle ship
	var shipGraphics = new Container();
	self.addChild(shipGraphics);
	// Create a pixel art triangle
	var triangleSize = 48;
	var pixelSize = 4; // Size of each "pixel"
	var pixelGap = 1; // Gap between pixels for hollow effect
	// Create triangle points - longest tip as front (rotated 90 degrees right)
	var points = [{
		x: 0,
		y: triangleSize
	},
	// Front tip (now pointing right)
	{
		x: -triangleSize / 2,
		y: -triangleSize / 2
	},
	// Bottom left (now top left)
	{
		x: triangleSize / 2,
		y: -triangleSize / 2
	} // Top left (now top right)
	];
	// Draw the outline with pixel art style
	for (var i = 0; i < 3; i++) {
		var startPoint = points[i];
		var endPoint = points[(i + 1) % 3];
		// Calculate step count based on distance
		var dx = endPoint.x - startPoint.x;
		var dy = endPoint.y - startPoint.y;
		var steps = Math.max(Math.abs(dx), Math.abs(dy)) / pixelSize;
		// Draw pixels along the line
		for (var step = 0; step <= steps; step++) {
			var px = startPoint.x + dx * (step / steps);
			var py = startPoint.y + dy * (step / steps);
			var pixel = LK.getAsset('shipShape', {
				anchorX: 0.5,
				anchorY: 0.5,
				width: pixelSize - pixelGap,
				height: pixelSize - pixelGap,
				x: px,
				y: py
			});
			shipGraphics.addChild(pixel);
		}
	}
	shipGraphics.x = 0;
	shipGraphics.y = 0;
	// Ship properties
	self.rotation = Math.PI / 2; // Start pointing downward
	self.rotationSpeed = 0.08; // Higher rotation speed for more responsive steering
	self.isRotatingLeft = false;
	self.isRotatingRight = false;
	self.isFiring = false;
	self.fireDelay = 15; // frames between shots
	self.fireTimer = 0;
	self.invulnerable = false;
	self.invulnerableTime = 0;
	// Physics-based movement properties
	self.position = {
		x: 0,
		y: 0
	}; // Current position
	self.velocity = {
		x: 0,
		y: 0
	};
	self.acceleration = {
		x: 0,
		y: 0
	}; // Current acceleration vector
	self.engineForce = 0.12; // Force applied each frame in the direction of heading
	self.drag = 0.98; // Air resistance/friction factor
	self.maxSpeed = 5; // Maximum allowed speed
	// Track previous position for movement calculations
	self.lastX = 0;
	self.lastY = 0;
	self.update = function () {
		// Store last position
		self.lastX = self.x;
		self.lastY = self.y;
		// Handle rotation
		if (self.isRotatingLeft) {
			self.rotation -= self.rotationSpeed;
		}
		if (self.isRotatingRight) {
			self.rotation += self.rotationSpeed;
		}
		shipGraphics.rotation = self.rotation;
		// Calculate direction vector based on ship heading
		var dirX = Math.cos(self.rotation - Math.PI / 2);
		var dirY = Math.sin(self.rotation - Math.PI / 2);
		// Apply constant engine force in the direction ship is facing
		self.acceleration.x = dirX * self.engineForce;
		self.acceleration.y = dirY * self.engineForce;
		// Update velocity using acceleration
		self.velocity.x += self.acceleration.x;
		self.velocity.y += self.acceleration.y;
		// Apply drag/friction to gradually slow down
		self.velocity.x *= self.drag;
		self.velocity.y *= self.drag;
		// Calculate current speed
		var speed = Math.sqrt(self.velocity.x * self.velocity.x + self.velocity.y * self.velocity.y);
		// Create thrust particles (only emit if moving fast enough)
		if (speed > 0.5 && LK.ticks % 3 === 0) {
			// Create a thrust particle
			var particle = new ThrustParticle();
			// Position at the back of the ship (opposite of direction)
			var backX = self.x - dirX * triangleSize * 0.5;
			var backY = self.y - dirY * triangleSize * 0.5;
			// Add some randomness
			backX += (Math.random() - 0.5) * 10;
			backY += (Math.random() - 0.5) * 10;
			particle.x = backX;
			particle.y = backY;
			// Set velocity opposite to ship direction with some randomness
			particle.velocity.x = -dirX * (1 + Math.random()) + (Math.random() - 0.5) * 0.5;
			particle.velocity.y = -dirY * (1 + Math.random()) + (Math.random() - 0.5) * 0.5;
			// Add to game via event
			if (typeof game.addThrustParticle === 'function') {
				game.addThrustParticle(particle);
			}
		}
		// Apply speed limit if exceeding maximum
		if (speed > self.maxSpeed) {
			var scaleFactor = self.maxSpeed / speed;
			self.velocity.x *= scaleFactor;
			self.velocity.y *= scaleFactor;
		}
		// Update position based on velocity
		self.x += self.velocity.x;
		self.y += self.velocity.y;
		// Wrap around screen edges
		if (self.x < 0) {
			self.x = 2048;
		}
		if (self.x > 2048) {
			self.x = 0;
		}
		if (self.y < 0) {
			self.y = 2732;
		}
		if (self.y > 2732) {
			self.y = 0;
		}
		// Handle firing
		if (self.isFiring) {
			if (self.fireTimer <= 0) {
				self.fireTimer = self.fireDelay;
				return true; // Signal to create a bullet
			}
		}
		if (self.fireTimer > 0) {
			self.fireTimer--;
		}
		// Handle invulnerability
		if (self.invulnerable) {
			self.invulnerableTime--;
			shipGraphics.alpha = Math.sin(LK.ticks * 0.5) * 0.5 + 0.5;
			if (self.invulnerableTime <= 0) {
				self.invulnerable = false;
				shipGraphics.alpha = 1;
			}
		}
		return false;
	};
	self.makeInvulnerable = function (frames) {
		self.invulnerable = true;
		self.invulnerableTime = frames;
	};
	return self;
});
var ThrustParticle = Container.expand(function () {
	var self = Container.call(this);
	// Create particle visual
	var particleGraphics = LK.getAsset('bulletShape', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 4,
		height: 4
	});
	particleGraphics.alpha = 0.8;
	self.addChild(particleGraphics);
	// Particle properties
	self.velocity = {
		x: 0,
		y: 0
	};
	self.lifespan = 20; // Frames before disappearing
	self.age = 0;
	self.update = function () {
		// Move according to velocity
		self.x += self.velocity.x;
		self.y += self.velocity.y;
		// Age the particle
		self.age++;
		// Fade out as it ages
		particleGraphics.alpha = 0.8 * (1 - self.age / self.lifespan);
		// Return true if particle should be removed
		return self.age >= self.lifespan;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Function to add thrust particles - called from Ship update
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Game variables
var ship;
var bullets = [];
var asteroids = [];
var thrustParticles = []; // Array to store thrust particles
var score = 0;
var lives = 3;
var level = 1;
var gameStarted = false;
var gameOver = false;
var triangleSize = 48; // Ship triangle size for bullet positioning
// UI elements
var leftButton;
var rightButton;
var fireButton;
var scoreTxt;
var livesTxt;
var levelTxt;
var startText;
// Initialize the game
function initGame() {
	// Create ship
	ship = new Ship();
	ship.x = 2048 / 2;
	ship.y = 200; // Position at top middle
	ship.makeInvulnerable(120); // 2 seconds
	// Add visual effect to indicate ship is ready for movement
	tween(ship, {
		alpha: 0.5
	}, {
		duration: 500,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			tween(ship, {
				alpha: 1
			}, {
				duration: 500,
				easing: tween.easeInOut
			});
		}
	});
	game.addChild(ship);
	// Create control buttons
	leftButton = new Button('rotateLeftButton');
	leftButton.x = 300; // Position on the left side
	leftButton.y = 2732 - 200; // Position at the bottom
	leftButton.scale.set(2, 2); // Make button bigger
	game.addChild(leftButton);
	// Fire button in the middle
	fireButton = new Button('fireButton');
	fireButton.x = 2048 / 2; // Position in middle
	fireButton.y = 2732 - 200; // Position at the bottom
	fireButton.scale.set(2, 2); // Make button bigger
	game.addChild(fireButton);
	// No forward button needed - ship will constantly move forward
	// Right rotation button
	rightButton = new Button('rotateRightButton');
	rightButton.x = 2048 - 300; // Position on the right side
	rightButton.y = 2732 - 200; // Position at the bottom
	rightButton.scale.set(2, 2); // Make button bigger
	game.addChild(rightButton);
	// Create UI text
	scoreTxt = new Text2('SCORE: 0', {
		size: 40,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0, 0);
	LK.gui.topRight.addChild(scoreTxt);
	livesTxt = new Text2('LIVES: 3', {
		size: 40,
		fill: 0xFFFFFF
	});
	livesTxt.anchor.set(0, 0);
	LK.gui.top.addChild(livesTxt);
	levelTxt = new Text2('LEVEL: 1', {
		size: 40,
		fill: 0xFFFFFF
	});
	levelTxt.anchor.set(1, 0);
	LK.gui.topLeft.addChild(levelTxt);
	// Start screen text
	if (!gameStarted) {
		startText = new Text2('TAP TO START', {
			size: 80,
			fill: 0xFFFFFF
		});
		startText.anchor.set(0.5, 0.5);
		LK.gui.center.addChild(startText);
	}
	// Clear any existing game objects
	bullets = [];
	asteroids = [];
	thrustParticles = [];
	// Initialize asteroids for the first level
	createAsteroidsForLevel(level);
	// Start game music
	LK.playMusic('gameMusic', {
		loop: true
	});
}
function createAsteroidsForLevel(level) {
	// Number of asteroids based on level
	var numAsteroids = Math.min(4 + level, 12);
	for (var i = 0; i < numAsteroids; i++) {
		var asteroid = new Asteroid(2); // Start with large asteroids
		// Position the asteroid away from the player
		do {
			asteroid.x = Math.random() * 2048;
			asteroid.y = Math.random() * 2732;
		} while (distance(asteroid.x, asteroid.y, ship.x, ship.y) < 300);
		asteroids.push(asteroid);
		game.addChild(asteroid);
	}
}
function distance(x1, y1, x2, y2) {
	return Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
}
function createBullet() {
	var bullet = new Bullet();
	// Use ship's exact rotation for both bullet position and direction
	var angle = ship.rotation;
	// Calculate the exact position of the ship's tip based on the triangle geometry
	// The front tip is triangleSize units along the angle from the ship's center
	var offsetX = Math.cos(angle) * triangleSize;
	var offsetY = Math.sin(angle) * triangleSize;
	// Position bullet precisely at the tip of the ship
	bullet.x = ship.x + offsetX;
	bullet.y = ship.y + offsetY;
	// Set bullet velocity to match ship's pointing direction exactly
	bullet.velocity.x = Math.cos(angle) * bullet.speed;
	bullet.velocity.y = Math.sin(angle) * bullet.speed;
	// Add bullet to game
	bullets.push(bullet);
	game.addChild(bullet);
	// Play shoot sound
	LK.getSound('shoot').play();
}
function updateAsteroids() {
	for (var i = asteroids.length - 1; i >= 0; i--) {
		var asteroid = asteroids[i];
		asteroid.update();
		// Check for collision with the ship
		if (!ship.invulnerable && asteroid.intersects(ship)) {
			// Player loses a life
			lives--;
			livesTxt.setText('LIVES: ' + lives);
			// Play explosion sound
			LK.getSound('explosion').play();
			// Flash screen
			LK.effects.flashScreen(0xFF0000, 500);
			// Make ship invulnerable for a few seconds
			ship.makeInvulnerable(180);
			// Game over if no lives left
			if (lives <= 0) {
				LK.setScore(score);
				LK.showGameOver();
				gameOver = true;
				return;
			}
		}
	}
}
function updateBullets() {
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Remove bullets that have lived too long
		if (bullet.age > bullet.lifespan) {
			game.removeChild(bullet);
			bullets.splice(i, 1);
			continue;
		}
		// Check for collisions with asteroids
		var hitAsteroid = false;
		for (var j = asteroids.length - 1; j >= 0; j--) {
			var asteroid = asteroids[j];
			if (bullet.intersects(asteroid)) {
				hitAsteroid = true;
				// Add score based on asteroid size
				score += asteroid.getPoints();
				scoreTxt.setText('SCORE: ' + score);
				// Play explosion sound
				LK.getSound('explosion').play();
				// Break asteroid into smaller pieces if it's not already the smallest
				if (asteroid.size > 0) {
					for (var k = 0; k < 2; k++) {
						var newAsteroid = new Asteroid(asteroid.size - 1);
						newAsteroid.x = asteroid.x;
						newAsteroid.y = asteroid.y;
						asteroids.push(newAsteroid);
						game.addChild(newAsteroid);
					}
				}
				// Remove the asteroid
				game.removeChild(asteroid);
				asteroids.splice(j, 1);
				break;
			}
		}
		if (hitAsteroid) {
			// Remove the bullet
			game.removeChild(bullet);
			bullets.splice(i, 1);
		}
	}
	// Check if all asteroids are destroyed
	if (asteroids.length === 0) {
		// Next level
		level++;
		levelTxt.setText('LEVEL: ' + level);
		// Create new asteroids for the next level
		createAsteroidsForLevel(level);
	}
}
// Main game update function
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update ship controls based on button state
	ship.isRotatingLeft = leftButton.isPressed;
	ship.isRotatingRight = rightButton.isPressed;
	ship.isFiring = fireButton.isPressed;
	// Ship constantly moves forward, no need for isMoving toggle
	// Update ship
	if (ship.update()) {
		createBullet();
	}
	// Update bullets and check for collisions
	updateBullets();
	// Update asteroids and check for collisions
	updateAsteroids();
	// Update thrust particles
	updateThrustParticles();
};
// Event handlers
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
		if (startText) {
			LK.gui.center.removeChild(startText);
			startText = null;
		}
	}
	// Ensure buttons can detect touch events when pressed
	var local;
	// Check left button
	local = leftButton.toLocal({
		x: x,
		y: y
	});
	if (local.x >= -leftButton.width / 2 && local.x <= leftButton.width / 2 && local.y >= -leftButton.height / 2 && local.y <= leftButton.height / 2) {
		leftButton.down(local.x, local.y, {});
	}
	// Check fire button
	local = fireButton.toLocal({
		x: x,
		y: y
	});
	if (local.x >= -fireButton.width / 2 && local.x <= fireButton.width / 2 && local.y >= -fireButton.height / 2 && local.y <= fireButton.height / 2) {
		fireButton.down(local.x, local.y, {});
	}
	// Forward button removed - ship moves constantly
	// Check right button
	local = rightButton.toLocal({
		x: x,
		y: y
	});
	if (local.x >= -rightButton.width / 2 && local.x <= rightButton.width / 2 && local.y >= -rightButton.height / 2 && local.y <= rightButton.height / 2) {
		rightButton.down(local.x, local.y, {});
	}
};
// Add up handler to handle releasing buttons
game.up = function (x, y, obj) {
	// Reset all button states when touch/click is released
	leftButton.up(0, 0, {});
	fireButton.up(0, 0, {});
	rightButton.up(0, 0, {});
};
// Initialize the game when this script runs
initGame();
// Function to add thrust particles - called from Ship update
game.addThrustParticle = function (particle) {
	thrustParticles.push(particle);
	game.addChild(particle);
};
// Function to update thrust particles
function updateThrustParticles() {
	for (var i = thrustParticles.length - 1; i >= 0; i--) {
		var particle = thrustParticles[i];
		// If particle update returns true, it means the particle should be removed
		if (particle.update()) {
			game.removeChild(particle);
			thrustParticles.splice(i, 1);
		}
	}
}

===================================================================
--- original.js
+++ change.js
@@ -231,51 +231,88 @@
 	shipGraphics.x = 0;
 	shipGraphics.y = 0;
 	// Ship properties
 	self.rotation = Math.PI / 2; // Start pointing downward
-	self.rotationSpeed = 0.05; // Increased for more sensitive turning
+	self.rotationSpeed = 0.08; // Higher rotation speed for more responsive steering
 	self.isRotatingLeft = false;
 	self.isRotatingRight = false;
-	self.isMoving = false;
 	self.isFiring = false;
 	self.fireDelay = 15; // frames between shots
 	self.fireTimer = 0;
 	self.invulnerable = false;
 	self.invulnerableTime = 0;
-	// Add movement properties
+	// Physics-based movement properties
+	self.position = {
+		x: 0,
+		y: 0
+	}; // Current position
 	self.velocity = {
 		x: 0,
 		y: 0
 	};
-	self.maxSpeed = 3; // Reduced from 5 to make ship slower
-	self.thrust = 0.05; // Reduced from 0.1 to make acceleration slower
-	self.friction = 0.98; // Slow deceleration
+	self.acceleration = {
+		x: 0,
+		y: 0
+	}; // Current acceleration vector
+	self.engineForce = 0.12; // Force applied each frame in the direction of heading
+	self.drag = 0.98; // Air resistance/friction factor
+	self.maxSpeed = 5; // Maximum allowed speed
+	// Track previous position for movement calculations
+	self.lastX = 0;
+	self.lastY = 0;
 	self.update = function () {
+		// Store last position
+		self.lastX = self.x;
+		self.lastY = self.y;
 		// Handle rotation
 		if (self.isRotatingLeft) {
 			self.rotation -= self.rotationSpeed;
 		}
 		if (self.isRotatingRight) {
 			self.rotation += self.rotationSpeed;
 		}
 		shipGraphics.rotation = self.rotation;
-		// Store rotation in a variable called rot
-		var rot = self.rotation;
-		// Apply thrust in the direction the ship is facing
-		// In this game, rotation of 0 points to the right, PI/2 points down
-		// We need to adjust the direction to match the visual orientation of the ship
-		self.velocity.x += Math.cos(rot - Math.PI / 2) * self.thrust;
-		self.velocity.y += Math.sin(rot - Math.PI / 2) * self.thrust;
-		// Apply speed limit
+		// Calculate direction vector based on ship heading
+		var dirX = Math.cos(self.rotation - Math.PI / 2);
+		var dirY = Math.sin(self.rotation - Math.PI / 2);
+		// Apply constant engine force in the direction ship is facing
+		self.acceleration.x = dirX * self.engineForce;
+		self.acceleration.y = dirY * self.engineForce;
+		// Update velocity using acceleration
+		self.velocity.x += self.acceleration.x;
+		self.velocity.y += self.acceleration.y;
+		// Apply drag/friction to gradually slow down
+		self.velocity.x *= self.drag;
+		self.velocity.y *= self.drag;
+		// Calculate current speed
 		var speed = Math.sqrt(self.velocity.x * self.velocity.x + self.velocity.y * self.velocity.y);
+		// Create thrust particles (only emit if moving fast enough)
+		if (speed > 0.5 && LK.ticks % 3 === 0) {
+			// Create a thrust particle
+			var particle = new ThrustParticle();
+			// Position at the back of the ship (opposite of direction)
+			var backX = self.x - dirX * triangleSize * 0.5;
+			var backY = self.y - dirY * triangleSize * 0.5;
+			// Add some randomness
+			backX += (Math.random() - 0.5) * 10;
+			backY += (Math.random() - 0.5) * 10;
+			particle.x = backX;
+			particle.y = backY;
+			// Set velocity opposite to ship direction with some randomness
+			particle.velocity.x = -dirX * (1 + Math.random()) + (Math.random() - 0.5) * 0.5;
+			particle.velocity.y = -dirY * (1 + Math.random()) + (Math.random() - 0.5) * 0.5;
+			// Add to game via event
+			if (typeof game.addThrustParticle === 'function') {
+				game.addThrustParticle(particle);
+			}
+		}
+		// Apply speed limit if exceeding maximum
 		if (speed > self.maxSpeed) {
-			self.velocity.x = self.velocity.x / speed * self.maxSpeed;
-			self.velocity.y = self.velocity.y / speed * self.maxSpeed;
+			var scaleFactor = self.maxSpeed / speed;
+			self.velocity.x *= scaleFactor;
+			self.velocity.y *= scaleFactor;
 		}
-		// Apply friction to slow down gradually
-		self.velocity.x *= self.friction;
-		self.velocity.y *= self.friction;
-		// Update position
+		// Update position based on velocity
 		self.x += self.velocity.x;
 		self.y += self.velocity.y;
 		// Wrap around screen edges
 		if (self.x < 0) {
@@ -316,12 +353,44 @@
 		self.invulnerableTime = frames;
 	};
 	return self;
 });
+var ThrustParticle = Container.expand(function () {
+	var self = Container.call(this);
+	// Create particle visual
+	var particleGraphics = LK.getAsset('bulletShape', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		width: 4,
+		height: 4
+	});
+	particleGraphics.alpha = 0.8;
+	self.addChild(particleGraphics);
+	// Particle properties
+	self.velocity = {
+		x: 0,
+		y: 0
+	};
+	self.lifespan = 20; // Frames before disappearing
+	self.age = 0;
+	self.update = function () {
+		// Move according to velocity
+		self.x += self.velocity.x;
+		self.y += self.velocity.y;
+		// Age the particle
+		self.age++;
+		// Fade out as it ages
+		particleGraphics.alpha = 0.8 * (1 - self.age / self.lifespan);
+		// Return true if particle should be removed
+		return self.age >= self.lifespan;
+	};
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
+// Function to add thrust particles - called from Ship update
 var game = new LK.Game({
 	backgroundColor: 0x000000
 });
 
@@ -331,8 +400,9 @@
 // Game variables
 var ship;
 var bullets = [];
 var asteroids = [];
+var thrustParticles = []; // Array to store thrust particles
 var score = 0;
 var lives = 3;
 var level = 1;
 var gameStarted = false;
@@ -418,8 +488,9 @@
 	}
 	// Clear any existing game objects
 	bullets = [];
 	asteroids = [];
+	thrustParticles = [];
 	// Initialize asteroids for the first level
 	createAsteroidsForLevel(level);
 	// Start game music
 	LK.playMusic('gameMusic', {
@@ -557,8 +628,10 @@
 	// Update bullets and check for collisions
 	updateBullets();
 	// Update asteroids and check for collisions
 	updateAsteroids();
+	// Update thrust particles
+	updateThrustParticles();
 };
 // Event handlers
 game.down = function (x, y, obj) {
 	if (!gameStarted) {
@@ -603,5 +676,21 @@
 	fireButton.up(0, 0, {});
 	rightButton.up(0, 0, {});
 };
 // Initialize the game when this script runs
-initGame();
\ No newline at end of file
+initGame();
+// Function to add thrust particles - called from Ship update
+game.addThrustParticle = function (particle) {
+	thrustParticles.push(particle);
+	game.addChild(particle);
+};
+// Function to update thrust particles
+function updateThrustParticles() {
+	for (var i = thrustParticles.length - 1; i >= 0; i--) {
+		var particle = thrustParticles[i];
+		// If particle update returns true, it means the particle should be removed
+		if (particle.update()) {
+			game.removeChild(particle);
+			thrustParticles.splice(i, 1);
+		}
+	}
+}
\ No newline at end of file