/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0,
	roverLevel: 1,
	speedLevel: 1,
	weaponLevel: 1
});

/**** 
* Classes
****/ 
var Alien = Container.expand(function () {
	var self = Container.call(this);
	var alienGraphics = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 1 + Math.random() * 2;
	self.health = 2;
	self.active = true;
	self.points = 25;
	self.movePattern = Math.floor(Math.random() * 3); // 0: straight, 1: zigzag, 2: sine
	self.moveCounter = 0;
	self.update = function () {
		// Alien shooting logic
		if (self.active && Math.random() < 0.01) {
			// Random chance to shoot
			var alienBullet = new AlienBullet();
			alienBullet.x = self.x;
			alienBullet.y = self.y + 40; // Start below the alien
			// Set random direction for multi-directional shooting
			alienBullet.directionX = Math.random() * 2 - 1; // Random value between -1 and 1
			alienBullet.directionY = 1; // Always shoot downwards
			alienBullets.push(alienBullet);
			game.addChild(alienBullet);
		}
		if (!self.active) {
			return;
		}
		self.y += self.speed;
		// Different movement patterns
		if (self.movePattern === 1) {
			// ZigZag
			if (self.moveCounter % 60 < 30) {
				self.x += 1.5;
			} else {
				self.x -= 1.5;
			}
		} else if (self.movePattern === 2) {
			// Sine wave
			self.x += Math.sin(self.moveCounter / 20) * 2;
		}
		self.moveCounter++;
		// Check if alien is off screen
		if (self.y > 2732 + 50) {
			self.active = false;
		}
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		// Flash effect
		LK.effects.flashObject(self, 0xFF0000, 200);
		if (self.health <= 0) {
			self.destroy();
		}
	};
	self.destroy = function () {
		self.active = false;
		// Scale out and fade
		tween(alienGraphics, {
			alpha: 0,
			scaleX: 0.2,
			scaleY: 0.2,
			rotation: Math.PI * 2
		}, {
			duration: 400,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				// Alien will be removed by the game update loop
			}
		});
	};
	return self;
});
var AlienBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4; // Reduced speed for alien bullets
	self.damage = 1;
	self.active = true;
	self.directionX = 0; // Initialize horizontal direction
	self.directionY = 1; // Initialize vertical direction
	self.update = function () {
		if (!self.active) {
			return;
		}
		self.x += self.speed * self.directionX; // Update x position based on direction
		self.y += self.speed * self.directionY; // Update y position based on direction
		// Check if bullet is off screen
		if (self.y > 2732 + 50 || self.x < -50 || self.x > 2048 + 50) {
			self.active = false;
		}
	};
	self.hit = function () {
		self.active = false;
		tween(bulletGraphics, {
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				// Bullet will be removed by the game update loop
			}
		});
	};
	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.damage = 1;
	self.active = true;
	self.update = function () {
		if (!self.active) {
			return;
		}
		self.y -= self.speed * 0.5; // Slow down the bullet speed by half
		// Check if bullet is off screen
		if (self.y < -50) {
			self.active = false;
		}
	};
	self.hit = function () {
		self.active = false;
		tween(bulletGraphics, {
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				// Bullet will be removed by the game update loop
			}
		});
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 1.5 + Math.random() * 1.5;
	self.active = true;
	self.update = function () {
		if (!self.active) {
			return;
		}
		self.y += self.speed;
		// Slowly rotate the obstacle
		obstacleGraphics.rotation += 0.01;
		// Check if obstacle is off screen
		if (self.y > 2732 + 50) {
			self.active = false;
		}
	};
	self.hit = function () {
		self.active = false;
		LK.effects.flashObject(self, 0xFF0000, 200);
		tween(obstacleGraphics, {
			alpha: 0,
			scaleX: 1.5,
			scaleY: 1.5,
			rotation: obstacleGraphics.rotation + Math.PI
		}, {
			duration: 300,
			onFinish: function onFinish() {
				// Obstacle will be removed by the game update loop
			}
		});
	};
	return self;
});
var Resource = Container.expand(function () {
	var self = Container.call(this);
	var resourceGraphics = self.attachAsset('resource', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.value = 10;
	self.active = true;
	self.speed = 2 + Math.random() * 2;
	self.update = function () {
		if (!self.active) {
			return;
		}
		self.y += self.speed;
		// Make the resource bob slightly side to side
		self.x += Math.sin(LK.ticks / 20) * 0.8;
		// Check if resource is off screen
		if (self.y > 2732 + 50) {
			self.active = false;
		}
	};
	self.collect = function () {
		self.active = false;
		tween(resourceGraphics, {
			alpha: 0,
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 300,
			onFinish: function onFinish() {
				// Resource will be removed by the game update loop
			}
		});
	};
	return self;
});
var Rover = Container.expand(function () {
	var self = Container.call(this);
	// Main rover body
	var roverBody = self.attachAsset('rover', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Left wheel
	var leftWheel = LK.getAsset('wheel', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -45,
		y: 25
	});
	self.addChild(leftWheel);
	// Right wheel
	var rightWheel = LK.getAsset('wheel', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 45,
		y: 25
	});
	self.addChild(rightWheel);
	// Solar panel
	var solarPanel = LK.getAsset('solar', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -20
	});
	self.addChild(solarPanel);
	// Antenna
	var antenna = LK.getAsset('antenna', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 30,
		y: -40
	});
	self.addChild(antenna);
	// Set rover properties
	self.speed = 5 + (storage.speedLevel - 1) * 0.8;
	self.fireRate = 800 - (storage.weaponLevel - 1) * 100;
	self.lastFire = 0;
	self.health = 3 + (storage.roverLevel - 1);
	self.shieldActive = false;
	// Initialize movement
	self.isMoving = false;
	self.targetX = 0;
	self.targetY = 0;
	self.moveTowards = function (x, y) {
		self.isMoving = true;
		self.targetX = x;
		self.targetY = y;
	};
	self.stopMoving = function () {
		self.isMoving = false;
	};
	self.update = function () {
		if (self.isMoving) {
			var dx = self.targetX - self.x;
			var dy = self.targetY - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > self.speed) {
				self.x += dx / distance * self.speed;
				self.y += dy / distance * self.speed;
				// Animate wheels
				leftWheel.rotation += 0.2;
				rightWheel.rotation += 0.2;
			} else {
				self.x = self.targetX;
				self.y = self.targetY;
			}
		}
		// Constrain to game bounds
		if (self.x < roverBody.width / 2) {
			self.x = roverBody.width / 2;
		} else if (self.x > 2048 - roverBody.width / 2) {
			self.x = 2048 - roverBody.width / 2;
		}
		if (self.y < roverBody.height / 2) {
			self.y = roverBody.height / 2;
		} else if (self.y > 2732 - roverBody.height / 2) {
			self.y = 2732 - roverBody.height / 2;
		}
	};
	self.fire = function () {
		var currentTime = Date.now();
		if (currentTime - self.lastFire < self.fireRate) {
			return null;
		}
		self.lastFire = currentTime;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y - 40;
		bullet.damage = storage.weaponLevel;
		// Play shoot sound
		LK.getSound('shoot').play();
		return bullet;
	};
	self.takeDamage = function () {
		if (self.shieldActive) {
			return;
		}
		self.health--;
		LK.effects.flashObject(self, 0xFF0000, 300);
		LK.getSound('damage').play();
		// Activate brief shield
		self.shieldActive = true;
		tween(roverBody, {
			alpha: 0.5
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(roverBody, {
					alpha: 1
				}, {
					duration: 200
				});
			}
		});
		// Deactivate shield after invulnerability period
		LK.setTimeout(function () {
			self.shieldActive = false;
		}, 1500);
		return self.health <= 0;
	};
	self.fire = function () {
		var currentTime = Date.now();
		if (currentTime - self.lastFire < self.fireRate) {
			return null;
		}
		self.lastFire = currentTime;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y - 40;
		bullet.damage = storage.weaponLevel;
		// Play shoot sound
		LK.getSound('shoot').play();
		return bullet;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xC0392B // Mars red
});

/**** 
* Game Code
****/ 
// Game state variables
var score = 0;
var level = 1;
var gameActive = true;
var spawnRate = 120; // Frames between spawns
var spawnCounter = 0;
var difficultyTimer = 0;
// Game objects
var rover;
var bullets = [];
var alienBullets = []; // Array to track alien bullets
var resources = [];
var aliens = [];
var obstacles = [];
// Background - Mars terrain
var terrainBackground = LK.getAsset('terrain', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(terrainBackground);
// Create rover
rover = new Rover();
rover.x = 2048 / 2;
rover.y = 2732 - 200;
game.addChild(rover);
// UI elements
var scoreTxt = new Text2('SCORE: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(scoreTxt);
scoreTxt.x = -scoreTxt.width - 20;
scoreTxt.y = 20;
var levelTxt = new Text2('LEVEL: 1', {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 20;
var healthTxt = new Text2('HEALTH: ' + rover.health, {
	size: 60,
	fill: 0xFFFFFF
});
healthTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(healthTxt);
healthTxt.x = -healthTxt.width - 20;
healthTxt.y = 90;
// Touch controls
var dragNode = null;
// Handle touch/mouse down
game.down = function (x, y, obj) {
	if (!gameActive) {
		return;
	}
	// Fire when touching the top half of the screen
	if (y < 2732 / 2) {
		var newBullet = rover.fire();
		if (newBullet) {
			bullets.push(newBullet);
			game.addChild(newBullet);
		}
	} else {
		// Move rover when touching the bottom half
		rover.moveTowards(x, y);
		dragNode = rover;
	}
};
// Handle touch/mouse move
game.move = function (x, y, obj) {
	if (!gameActive || !dragNode) {
		return;
	}
	rover.moveTowards(x, y);
};
// Handle touch/mouse up
game.up = function (x, y, obj) {
	dragNode = null;
};
// Spawn a resource
function spawnResource() {
	var resource = new Resource();
	resource.x = 100 + Math.random() * (2048 - 200);
	resource.y = -50;
	resources.push(resource);
	game.addChild(resource);
}
// Spawn an alien
function spawnAlien() {
	var alien = new Alien();
	alien.x = 100 + Math.random() * (2048 - 200);
	alien.y = -50;
	alien.health = 1 + Math.floor(level / 3);
	alien.points = 25 + level * 5;
	aliens.push(alien);
	game.addChild(alien);
}
// Spawn an obstacle
function spawnObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 100 + Math.random() * (2048 - 200);
	obstacle.y = -50;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Update score display
function updateScore(newScore) {
	score = newScore;
	scoreTxt.setText('SCORE: ' + score);
	scoreTxt.x = -scoreTxt.width - 20;
	// Update high score if needed
	if (score > storage.highScore) {
		storage.highScore = score;
	}
}
// Update level display
function updateLevel(newLevel) {
	level = newLevel;
	levelTxt.setText('LEVEL: ' + level);
	// Increase difficulty with level
	spawnRate = Math.max(60, 120 - level * 10);
}
// Update health display
function updateHealth() {
	healthTxt.setText('HEALTH: ' + rover.health);
	healthTxt.x = -healthTxt.width - 20;
}
// Start background music
LK.playMusic('bgMusic', {
	loop: true,
	fade: {
		start: 0,
		end: 0.3,
		duration: 1000
	}
});
// Game update loop
game.update = function () {
	if (!gameActive) {
		return;
	}
	// Increase difficulty over time
	difficultyTimer++;
	if (difficultyTimer >= 900) {
		// Every 15 seconds
		difficultyTimer = 0;
		updateLevel(level + 1);
	}
	// Spawn objects
	spawnCounter++;
	if (spawnCounter >= spawnRate) {
		spawnCounter = 0;
		// Randomly decide what to spawn
		var rand = Math.random();
		if (rand < 0.5) {
			spawnResource();
		} else if (rand < 0.8) {
			spawnAlien();
		} else {
			spawnObstacle();
		}
	}
	// Update rover
	rover.update();
	// Auto fire bullets from rover
	var newBullet = rover.fire();
	if (newBullet) {
		bullets.push(newBullet);
		game.addChild(newBullet);
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Remove inactive bullets
		if (!bullet.active) {
			game.removeChild(bullet);
			bullets.splice(i, 1);
		}
	}
	// Update alien bullets
	for (var i = alienBullets.length - 1; i >= 0; i--) {
		var alienBullet = alienBullets[i];
		alienBullet.update();
		// Check for collision with rover
		if (alienBullet.active && alienBullet.intersects(rover)) {
			alienBullet.hit();
			var gameOver = rover.takeDamage();
			updateHealth();
			if (gameOver) {
				endGame();
			}
		}
		// Remove inactive alien bullets
		if (!alienBullet.active) {
			game.removeChild(alienBullet);
			alienBullets.splice(i, 1);
		}
	}
	// Update resources
	for (var i = resources.length - 1; i >= 0; i--) {
		var resource = resources[i];
		resource.update();
		// Check for collision with rover
		if (resource.active && resource.intersects(rover)) {
			resource.collect();
			updateScore(score + resource.value);
			rover.health = Math.min(rover.health + 1, 3 + (storage.roverLevel - 1)); // Restore health, max health depends on rover level
			updateHealth(); // Update health display
			LK.getSound('collect').play();
		}
		// Remove inactive resources
		if (!resource.active) {
			game.removeChild(resource);
			resources.splice(i, 1);
		}
	}
	// Update aliens
	for (var i = aliens.length - 1; i >= 0; i--) {
		var alien = aliens[i];
		alien.update();
		// Check for collision with bullets
		for (var j = bullets.length - 1; j >= 0; j--) {
			var bullet = bullets[j];
			if (alien.active && bullet.active && alien.intersects(bullet)) {
				bullet.hit();
				alien.takeDamage(bullet.damage);
				if (!alien.active) {
					updateScore(score + alien.points);
				}
			}
		}
		// Check for collision with rover
		if (alien.active && alien.intersects(rover)) {
			alien.destroy();
			var gameOver = rover.takeDamage();
			updateHealth();
			if (gameOver) {
				endGame();
			}
		}
		// Remove inactive aliens
		if (!alien.active) {
			game.removeChild(alien);
			aliens.splice(i, 1);
		}
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.update();
		// Check for collision with bullets
		for (var j = bullets.length - 1; j >= 0; j--) {
			var bullet = bullets[j];
			if (obstacle.active && bullet.active && obstacle.intersects(bullet)) {
				bullet.hit();
				// Obstacles are not destroyed by bullets, but bullets are destroyed
			}
		}
		// Check for collision with rover
		if (obstacle.active && obstacle.intersects(rover)) {
			obstacle.hit();
			var gameOver = rover.takeDamage();
			updateHealth();
			if (gameOver) {
				endGame();
			}
		}
		// Remove inactive obstacles
		if (!obstacle.active) {
			game.removeChild(obstacle);
			obstacles.splice(i, 1);
		}
	}
};
// End the game
function endGame() {
	gameActive = false;
	// Save final score to leaderboard
	LK.setScore(score);
	// Play explosion sound
	LK.getSound('explosion').play();
	// Flash screen and show game over
	LK.effects.flashScreen(0xFF0000, 1000);
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1000);
}

===================================================================
--- original.js
+++ change.js
@@ -587,8 +587,10 @@
 		// Check for collision with rover
 		if (resource.active && resource.intersects(rover)) {
 			resource.collect();
 			updateScore(score + resource.value);
+			rover.health = Math.min(rover.health + 1, 3 + (storage.roverLevel - 1)); // Restore health, max health depends on rover level
+			updateHealth(); // Update health display
 			LK.getSound('collect').play();
 		}
 		// Remove inactive resources
 		if (!resource.active) {