/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1", { highScore: 0, level: 1 }); /**** * Classes ****/ var Asteroid = Container.expand(function () { var self = Container.call(this); var asteroidGraphics = self.attachAsset('asteroid', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5 + Math.random() * 3; self.rotationSpeed = (Math.random() - 0.5) * 0.1; self.size = 0.6 + Math.random() * 0.8; asteroidGraphics.scale.set(self.size, self.size); self.update = function () { self.y += self.speed; self.rotation += self.rotationSpeed; // If asteroid goes off screen, remove it if (self.y > 2732 + 100) { self.destroyed = true; } }; return self; }); var Boss = Container.expand(function () { var self = Container.call(this); var bossGraphics = self.attachAsset('boss', { anchorX: 0.5, anchorY: 0.5 }); self.health = 10; self.speed = 1.5; self.state = 'entering'; // entering, attacking, exiting self.attackTimer = 0; self.moveDirection = 1; self.points = 2000; self.update = function () { if (self.state === 'entering') { self.y += self.speed; if (self.y >= 300) { self.state = 'attacking'; } } else if (self.state === 'attacking') { // Move side to side self.x += self.speed * 2 * self.moveDirection; // Reverse direction at screen edges if (self.x < 400 || self.x > 2048 - 400) { self.moveDirection *= -1; } // Attack logic self.attackTimer++; if (self.attackTimer >= 60) { // Spawn enemy if (Math.random() < 0.5) { var enemy = new Enemy(); enemy.x = self.x + (Math.random() - 0.5) * 200; enemy.y = self.y + 100; game.enemies.push(enemy); game.addChild(enemy); } self.attackTimer = 0; } } else if (self.state === 'exiting') { self.y -= self.speed * 2; if (self.y < -300) { self.destroyed = true; } } }; self.damage = function () { self.health--; LK.effects.flashObject(self, 0xffffff, 300); if (self.health <= 0) { self.state = 'exiting'; } }; 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 = 15; self.update = function () { self.y -= self.speed; // If bullet goes off screen, remove it if (self.y < -100) { self.destroyed = true; } }; return self; }); var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 4 + Math.random() * 2; self.horizontalSpeed = (Math.random() - 0.5) * 4; self.points = 100; self.update = function () { self.y += self.speed; self.x += self.horizontalSpeed; // Bounce off walls if (self.x < 100 || self.x > 2048 - 100) { self.horizontalSpeed *= -1; } // If enemy goes off screen, remove it if (self.y > 2732 + 100) { self.destroyed = true; } }; return self; }); var Player = Container.expand(function () { var self = Container.call(this); var playerGraphics = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); self.shieldActive = false; self.shieldGraphics = null; self.bulletTimer = 0; self.canShoot = false; self.invulnerable = false; self.activateShield = function (duration) { if (self.shieldActive) { return; } self.shieldActive = true; self.shieldGraphics = self.attachAsset('shield', { anchorX: 0.5, anchorY: 0.5, alpha: 0.5 }); LK.setTimeout(function () { if (self.shieldGraphics) { self.shieldGraphics.destroy(); self.shieldGraphics = null; } self.shieldActive = false; }, duration); }; self.activateWeapon = function (duration) { self.canShoot = true; LK.setTimeout(function () { self.canShoot = false; }, duration); }; self.makeInvulnerable = function (duration) { self.invulnerable = true; // Flash effect to show invulnerability var flashCount = 0; var flashInterval = LK.setInterval(function () { playerGraphics.alpha = playerGraphics.alpha === 1 ? 0.3 : 1; flashCount++; if (flashCount > 10) { LK.clearInterval(flashInterval); playerGraphics.alpha = 1; } }, 150); LK.setTimeout(function () { self.invulnerable = false; playerGraphics.alpha = 1; LK.clearInterval(flashInterval); }, duration); }; self.shoot = function () { if (!self.canShoot) { return; } if (self.bulletTimer <= 0) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y - 50; game.bullets.push(bullet); game.addChild(bullet); LK.getSound('shoot').play(); self.bulletTimer = 10; // Rate of fire control } }; self.update = function () { if (self.bulletTimer > 0) { self.bulletTimer--; } if (self.canShoot) { self.shoot(); } if (self.shieldGraphics) { self.shieldGraphics.rotation += 0.02; } }; return self; }); var PowerUp = Container.expand(function () { var self = Container.call(this); var type = Math.floor(Math.random() * 3); // 0: shield, 1: weapon, 2: speed var colors = [0x2ecc71, 0xf1c40f, 0x9b59b6]; var powerupGraphics = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5, tint: colors[type] }); self.type = type; self.speed = 3; self.update = function () { self.y += self.speed; self.rotation += 0.02; // If powerup goes off screen, remove it if (self.y > 2732 + 100) { self.destroyed = true; } }; return self; }); var Star = Container.expand(function () { var self = Container.call(this); var brightness = 0.3 + Math.random() * 0.7; var starGraphics = self.attachAsset('star', { anchorX: 0.5, anchorY: 0.5, alpha: brightness }); self.speed = 1 + Math.random() * 3; self.update = function () { self.y += self.speed; // If star goes off screen, reset to top if (self.y > 2732 + 50) { self.y = -50; self.x = Math.random() * 2048; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000033 }); /**** * Game Code ****/ // Game state variables var player; var score = 0; var level = storage.level || 1; var highScore = storage.highScore || 0; var gameActive = true; var dragNode = null; var spawnTimer = 0; var difficultyTimer = 0; var bossSpawnLevel = 5; var currentBoss = null; var spawnRate = 100; var scoreDisplay; var levelDisplay; var stars = []; // Collection arrays game.asteroids = []; game.enemies = []; game.powerups = []; game.bullets = []; // Initialize player function initPlayer() { player = new Player(); player.x = 2048 / 2; player.y = 2732 - 250; game.addChild(player); // Start with brief invulnerability player.makeInvulnerable(2000); } // Initialize stars background function initStars() { for (var i = 0; i < 50; i++) { var star = new Star(); star.x = Math.random() * 2048; star.y = Math.random() * 2732; stars.push(star); game.addChild(star); } } // Initialize UI function initUI() { // Score display scoreDisplay = new Text2('Score: 0', { size: 80, fill: 0xFFFFFF }); scoreDisplay.anchor.set(0, 0); LK.gui.topRight.addChild(scoreDisplay); // Level display levelDisplay = new Text2('Level: ' + level, { size: 80, fill: 0xFFFFFF }); levelDisplay.anchor.set(0, 0); LK.gui.topRight.addChild(levelDisplay); levelDisplay.y = 100; // High score display var highScoreDisplay = new Text2('High Score: ' + highScore, { size: 60, fill: 0xFFFF00 }); highScoreDisplay.anchor.set(0, 0); LK.gui.topRight.addChild(highScoreDisplay); highScoreDisplay.y = 200; } // Update score function updateScore(points) { score += points; scoreDisplay.setText('Score: ' + score); // Check for high score if (score > highScore) { highScore = score; storage.highScore = highScore; } LK.setScore(score); } // Spawn asteroid function spawnAsteroid() { var asteroid = new Asteroid(); asteroid.x = Math.random() * 2048; asteroid.y = -100; game.asteroids.push(asteroid); game.addChild(asteroid); } // Spawn enemy function spawnEnemy() { var enemy = new Enemy(); enemy.x = Math.random() * 2048; enemy.y = -100; game.enemies.push(enemy); game.addChild(enemy); } // Spawn powerup function spawnPowerup() { var powerup = new PowerUp(); powerup.x = Math.random() * 2048; powerup.y = -100; game.powerups.push(powerup); game.addChild(powerup); } // Spawn boss function spawnBoss() { currentBoss = new Boss(); currentBoss.x = 2048 / 2; currentBoss.y = -300; game.addChild(currentBoss); LK.getSound('boss_arrival').play(); LK.effects.flashScreen(0xff0000, 500); } // Check collision between two objects function checkCollision(obj1, obj2) { return obj1.intersects(obj2); } // Handle player collision with obstacle function handlePlayerCollision() { if (player.invulnerable) { return false; } if (player.shieldActive) { // Shield absorbs one hit player.shieldActive = false; if (player.shieldGraphics) { player.shieldGraphics.destroy(); player.shieldGraphics = null; } LK.effects.flashObject(player, 0x2ecc71, 500); return false; } // Player hit - game over LK.effects.flashScreen(0xff0000, 1000); LK.getSound('explosion').play(); gameActive = false; // Store level progress storage.level = level; // Show game over after a short delay LK.setTimeout(function () { LK.showGameOver(); }, 1200); return true; } // Apply powerup effect function applyPowerup(type) { switch (type) { case 0: // Shield player.activateShield(10000); break; case 1: // Weapon player.activateWeapon(8000); break; case 2: // Speed boost player.makeInvulnerable(5000); break; } LK.getSound('powerup_collect').play(); } // Level up function levelUp() { level++; levelDisplay.setText('Level: ' + level); // Speed up spawning as levels increase spawnRate = Math.max(30, 100 - level * 5); // Show level up indicator var levelUpText = new Text2('LEVEL ' + level, { size: 150, fill: 0xFFFF00 }); levelUpText.anchor.set(0.5, 0.5); levelUpText.x = 2048 / 2; levelUpText.y = 2732 / 2; game.addChild(levelUpText); // Animate level up text tween(levelUpText, { alpha: 0, scaleX: 2, scaleY: 2 }, { duration: 1500, onFinish: function onFinish() { levelUpText.destroy(); } }); // Check if it's a boss level if (level % bossSpawnLevel === 0) { spawnBoss(); } } // Handle player movement function handleMove(x, y) { if (!gameActive || !dragNode) { return; } // Constrain player to screen bounds var boundedX = Math.max(100, Math.min(2048 - 100, x)); var boundedY = Math.max(100, Math.min(2732 - 100, y)); dragNode.x = boundedX; dragNode.y = boundedY; } // Mouse or touch events game.down = function (x, y) { if (!gameActive) { return; } dragNode = player; handleMove(x, y); }; game.move = function (x, y) { handleMove(x, y); }; game.up = function () { dragNode = null; }; // Initialize game function initGame() { // Play background music LK.playMusic('game_music'); // Initialize game components initStars(); initPlayer(); initUI(); // Reset game state gameActive = true; score = 0; updateScore(0); } // Initialize the game initGame(); // Game update loop game.update = function () { if (!gameActive) { return; } // Update difficulty over time difficultyTimer++; if (difficultyTimer >= 1800) { // 30 seconds difficultyTimer = 0; levelUp(); } // Spawn objects spawnTimer++; if (spawnTimer >= spawnRate) { spawnTimer = 0; // Determine what to spawn based on probability var rand = Math.random(); if (rand < 0.6) { spawnAsteroid(); } else if (rand < 0.9) { spawnEnemy(); } else { spawnPowerup(); } } // Update stars for (var i = 0; i < stars.length; i++) { stars[i].update(); } // Update player if (player) { player.update(); } // Update boss if (currentBoss) { currentBoss.update(); if (currentBoss.destroyed) { // Award points when boss is defeated updateScore(currentBoss.points); currentBoss = null; } } // Update asteroids for (var a = game.asteroids.length - 1; a >= 0; a--) { var asteroid = game.asteroids[a]; asteroid.update(); // Check for collision with player if (player && checkCollision(player, asteroid)) { if (handlePlayerCollision()) { break; // Game over, stop checking collisions } // Remove asteroid after collision asteroid.destroy(); game.asteroids.splice(a, 1); continue; } // Remove if marked as destroyed if (asteroid.destroyed) { asteroid.destroy(); game.asteroids.splice(a, 1); } } // Update enemies for (var e = game.enemies.length - 1; e >= 0; e--) { var enemy = game.enemies[e]; enemy.update(); // Check for collision with player if (player && checkCollision(player, enemy)) { if (handlePlayerCollision()) { break; // Game over, stop checking collisions } // Remove enemy after collision enemy.destroy(); game.enemies.splice(e, 1); continue; } // Remove if marked as destroyed if (enemy.destroyed) { enemy.destroy(); game.enemies.splice(e, 1); } } // Update powerups for (var p = game.powerups.length - 1; p >= 0; p--) { var powerup = game.powerups[p]; powerup.update(); // Check for collision with player if (player && checkCollision(player, powerup)) { applyPowerup(powerup.type); powerup.destroy(); game.powerups.splice(p, 1); // Award points for collecting powerup updateScore(50); continue; } // Remove if marked as destroyed if (powerup.destroyed) { powerup.destroy(); game.powerups.splice(p, 1); } } // Update bullets for (var b = game.bullets.length - 1; b >= 0; b--) { var bullet = game.bullets[b]; bullet.update(); var hitSomething = false; // Check for collision with enemies for (var e2 = game.enemies.length - 1; e2 >= 0; e2--) { var enemy2 = game.enemies[e2]; if (checkCollision(bullet, enemy2)) { // Remove enemy enemy2.destroy(); game.enemies.splice(e2, 1); // Award points updateScore(enemy2.points); hitSomething = true; LK.getSound('explosion').play(); break; } } // Check for collision with asteroids if (!hitSomething) { for (var a2 = game.asteroids.length - 1; a2 >= 0; a2--) { var asteroid2 = game.asteroids[a2]; if (checkCollision(bullet, asteroid2)) { // Remove asteroid asteroid2.destroy(); game.asteroids.splice(a2, 1); // Award points updateScore(50); hitSomething = true; LK.getSound('explosion').play(); break; } } } // Check for collision with boss if (!hitSomething && currentBoss && checkCollision(bullet, currentBoss)) { currentBoss.damage(); hitSomething = true; } // Remove bullet if it hit something or went off-screen if (hitSomething || bullet.destroyed) { bullet.destroy(); game.bullets.splice(b, 1); } } // Survive points (small increment every second) if (LK.ticks % 60 === 0) { updateScore(1); } };