/**** * 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); }