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

/**** 
* Classes
****/ 
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = (Math.random() - 0.5) * 4;
	self.velocityY = Math.random() * 3 + 2;
	self.rotationSpeed = (Math.random() - 0.5) * 0.2;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		self.rotation += self.rotationSpeed;
	};
	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.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var platformGraphics = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 2;
	self.hasLanded = false;
	self.update = function () {
		self.y += self.velocityY;
	};
	return self;
});
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.maxSpeed = 8;
	self.friction = 0.85;
	self.update = function () {
		// Apply velocity
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Apply friction
		self.velocityX *= self.friction;
		self.velocityY *= self.friction;
		// Keep ship within bounds
		if (self.x < 40) self.x = 40;
		if (self.x > 2008) self.x = 2008;
		if (self.y < 60) self.y = 60;
		if (self.y > 2672) self.y = 2672;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var spaceship = game.addChild(new Spaceship());
spaceship.x = 1024;
spaceship.y = 150;
var asteroids = [];
var bullets = [];
var platforms = [];
var dragNode = null;
var lastTouchTime = 0;
var difficultyLevel = 1;
var asteroidSpawnRate = 180; // Initial spawn rate in ticks
// Score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Lives display
var livesTxt = new Text2('Lives: 3', {
	size: 60,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(livesTxt);
var lives = 3;
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
}
function updateLives() {
	livesTxt.setText('Lives: ' + lives);
}
// Create single asteroid
var singleAsteroid = game.addChild(new Asteroid());
singleAsteroid.x = Math.random() * 1500 + 274; // Random position but not too close to edges
singleAsteroid.y = Math.random() * 1000 + 800; // Middle area of screen
singleAsteroid.velocityX = 0; // Make it stationary
singleAsteroid.velocityY = 0;
asteroids.push(singleAsteroid);
// Create single landing platform at bottom
var landingPlatform = game.addChild(new Platform());
landingPlatform.x = 1024;
landingPlatform.y = 2600;
landingPlatform.velocityY = 0; // Make it stationary
platforms.push(landingPlatform);
function fireBullet() {
	var bullet = new Bullet();
	bullet.x = spaceship.x;
	bullet.y = spaceship.y + 60;
	bullet.lastY = bullet.y;
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('shoot').play();
}
function handleMove(x, y, obj) {
	if (dragNode) {
		var deltaX = x - dragNode.x;
		var deltaY = y - dragNode.y;
		dragNode.velocityX += deltaX * 0.3;
		dragNode.velocityY += deltaY * 0.3;
		// Limit velocity
		if (dragNode.velocityX > dragNode.maxSpeed) dragNode.velocityX = dragNode.maxSpeed;
		if (dragNode.velocityX < -dragNode.maxSpeed) dragNode.velocityX = -dragNode.maxSpeed;
		if (dragNode.velocityY > dragNode.maxSpeed) dragNode.velocityY = dragNode.maxSpeed;
		if (dragNode.velocityY < -dragNode.maxSpeed) dragNode.velocityY = -dragNode.maxSpeed;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	var currentTime = Date.now();
	// Check for tap to shoot (if not dragging and within reasonable time)
	if (!dragNode && currentTime - lastTouchTime > 200) {
		fireBullet();
	}
	// Start dragging spaceship
	dragNode = spaceship;
	lastTouchTime = currentTime;
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	// Increase difficulty over time
	if (LK.ticks % 1800 == 0) {
		// Every 30 seconds
		difficultyLevel++;
		asteroidSpawnRate = Math.max(60, asteroidSpawnRate - 20);
	}
	// Single asteroid and platform gameplay - no spawning needed
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Remove bullets that go off screen (bottom)
		if (bullet.lastY <= 2762 && bullet.y > 2762) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update asteroids
	for (var j = asteroids.length - 1; j >= 0; j--) {
		var asteroid = asteroids[j];
		// Check collision with spaceship
		if (asteroid.intersects(spaceship)) {
			LK.effects.flashScreen(0xff0000, 500);
			lives--;
			updateLives();
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		// Check collision with bullets
		for (var k = bullets.length - 1; k >= 0; k--) {
			var bullet = bullets[k];
			if (bullet.intersects(asteroid)) {
				// Destroy both asteroid and bullet
				LK.setScore(LK.getScore() + 10);
				updateScore();
				LK.getSound('explosion').play();
				asteroid.destroy();
				asteroids.splice(j, 1);
				bullet.destroy();
				bullets.splice(k, 1);
				break;
			}
		}
	}
	// Update platforms
	for (var l = platforms.length - 1; l >= 0; l--) {
		var platform = platforms[l];
		// Check landing on platform
		if (!platform.hasLanded && platform.intersects(spaceship)) {
			// Successful landing
			var landingSpeed = Math.abs(spaceship.velocityY);
			if (landingSpeed < 4) {
				// Gentle landing - award points
				LK.setScore(LK.getScore() + 50);
				updateScore();
				LK.getSound('landing').play();
				platform.hasLanded = true;
				// Flash platform green
				LK.effects.flashObject(platform, 0x00ff00, 1000);
				// Win condition - successfully landed
				LK.showYouWin();
			} else {
				// Hard landing - lose life
				LK.effects.flashScreen(0xff0000, 500);
				lives--;
				updateLives();
				if (lives <= 0) {
					LK.showGameOver();
					return;
				}
			}
		}
	}
	// Check win condition
	if (LK.getScore() >= 1000) {
		LK.showYouWin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -27,9 +27,9 @@
 	var bulletGraphics = self.attachAsset('bullet', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = -12;
+	self.speed = 12;
 	self.update = function () {
 		self.y += self.speed;
 	};
 	return self;
@@ -84,9 +84,9 @@
 * Game Code
 ****/ 
 var spaceship = game.addChild(new Spaceship());
 spaceship.x = 1024;
-spaceship.y = 200;
+spaceship.y = 150;
 var asteroids = [];
 var bullets = [];
 var platforms = [];
 var dragNode = null;
@@ -129,9 +129,9 @@
 platforms.push(landingPlatform);
 function fireBullet() {
 	var bullet = new Bullet();
 	bullet.x = spaceship.x;
-	bullet.y = spaceship.y - 60;
+	bullet.y = spaceship.y + 60;
 	bullet.lastY = bullet.y;
 	bullets.push(bullet);
 	game.addChild(bullet);
 	LK.getSound('shoot').play();
@@ -173,10 +173,10 @@
 	// Single asteroid and platform gameplay - no spawning needed
 	// Update bullets
 	for (var i = bullets.length - 1; i >= 0; i--) {
 		var bullet = bullets[i];
-		// Remove bullets that go off screen
-		if (bullet.lastY >= -30 && bullet.y < -30) {
+		// Remove bullets that go off screen (bottom)
+		if (bullet.lastY <= 2762 && bullet.y > 2762) {
 			bullet.destroy();
 			bullets.splice(i, 1);
 			continue;
 		}