/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1", { highScore: 0 }); /**** * Classes ****/ var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphic = self.attachAsset('enemyShip', { anchorX: 0.5, anchorY: 0.5 }); self.health = 2; self.speed = 2; self.fireRate = 120; self.nextFire = Math.floor(Math.random() * 60); self.scoreValue = 100; self.movementPattern = Math.floor(Math.random() * 3); // 0: Straight, 1: Sine wave, 2: Zigzag self.movementTime = 0; self.update = function () { self.y += self.speed; // Movement patterns self.movementTime++; if (self.movementPattern === 1) { // Sine wave movement self.x += Math.sin(self.movementTime * 0.05) * 3; } else if (self.movementPattern === 2) { // Zigzag movement if (self.movementTime % 60 < 30) { self.x += 2; } else { self.x -= 2; } } // Fire bullets if (self.nextFire <= 0) { if (enemyBullets.length < 50) { var bullet = new EnemyBullet(); bullet.x = self.x; bullet.y = self.y + 50; game.addChild(bullet); enemyBullets.push(bullet); LK.getSound('enemyShoot').play(); } self.nextFire = self.fireRate; } else { self.nextFire--; } }; self.takeDamage = function () { self.health--; if (self.health <= 0) { // Create explosion var explosion = new Explosion(); explosion.x = self.x; explosion.y = self.y; game.addChild(explosion); // Play explosion sound LK.getSound('explosion').play(); // Add score LK.setScore(LK.getScore() + self.scoreValue); // Random chance to spawn power-up if (Math.random() < 0.2) { var powerUp = new PowerUp(); powerUp.x = self.x; powerUp.y = self.y; game.addChild(powerUp); powerUps.push(powerUp); } return true; // Enemy is destroyed } // Flash enemy red to indicate damage LK.effects.flashObject(self, 0xff0000, 200); return false; // Enemy survived }; return self; }); var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphic = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 10; self.update = function () { self.y += self.speed; }; return self; }); var Explosion = Container.expand(function () { var self = Container.call(this); var explosionGraphic = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5 }); self.lifetime = 0; self.maxLifetime = 30; self.update = function () { self.lifetime++; // Scale down and fade out var progress = self.lifetime / self.maxLifetime; explosionGraphic.alpha = 1 - progress; explosionGraphic.scale.x = 1 + progress; explosionGraphic.scale.y = 1 + progress; if (self.lifetime >= self.maxLifetime) { self.destroy(); } }; return self; }); var Player = Container.expand(function () { var self = Container.call(this); var playerGraphic = self.attachAsset('playerShip', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 10; self.fireRate = 15; self.nextFire = 0; self.lives = 3; self.isInvulnerable = false; self.invulnerableTime = 0; self.maxInvulnerableTime = 120; self.powerUps = { shield: false, doubleFire: false, speedBoost: false }; self.powerUpTimers = { shield: 0, doubleFire: 0, speedBoost: 0 }; self.update = function () { // Update fire cooldown if (self.nextFire > 0) { self.nextFire--; } // Update invulnerability if (self.isInvulnerable) { self.invulnerableTime++; // Blink effect during invulnerability playerGraphic.alpha = Math.sin(self.invulnerableTime * 0.2) * 0.5 + 0.5; if (self.invulnerableTime >= self.maxInvulnerableTime) { self.isInvulnerable = false; playerGraphic.alpha = 1; } } // Update power-up timers for (var powerUp in self.powerUpTimers) { if (self.powerUps[powerUp] && self.powerUpTimers[powerUp] > 0) { self.powerUpTimers[powerUp]--; if (self.powerUpTimers[powerUp] <= 0) { self.powerUps[powerUp] = false; } } } }; self.fire = function () { if (self.nextFire <= 0) { if (self.powerUps.doubleFire) { // Double fire power-up var bullet1 = new PlayerBullet(); bullet1.x = self.x - 20; bullet1.y = self.y - 20; game.addChild(bullet1); playerBullets.push(bullet1); var bullet2 = new PlayerBullet(); bullet2.x = self.x + 20; bullet2.y = self.y - 20; game.addChild(bullet2); playerBullets.push(bullet2); } else { // Normal fire var bullet = new PlayerBullet(); bullet.x = self.x; bullet.y = self.y - 20; game.addChild(bullet); playerBullets.push(bullet); } // Reset fire cooldown self.nextFire = self.fireRate; // Play shoot sound LK.getSound('playerShoot').play(); } }; self.takeDamage = function () { if (self.isInvulnerable) { return false; } if (self.powerUps.shield) { // Shield absorbs the hit self.powerUps.shield = false; // Flash player blue to indicate shield hit LK.effects.flashObject(self, 0x3498db, 500); return false; } // Player takes damage self.lives--; // Update lives display updateLivesDisplay(); if (self.lives <= 0) { // Game over var explosion = new Explosion(); explosion.x = self.x; explosion.y = self.y; game.addChild(explosion); // Play explosion sound LK.getSound('explosion').play(); // Flash screen red LK.effects.flashScreen(0xff0000, 1000); // Update high score if needed if (LK.getScore() > storage.highScore) { storage.highScore = LK.getScore(); } // Show game over after a delay LK.setTimeout(function () { LK.showGameOver(); }, 1500); return true; // Player is destroyed } // Make player invulnerable temporarily self.isInvulnerable = true; self.invulnerableTime = 0; // Flash player red LK.effects.flashObject(self, 0xff0000, 200); return false; // Player survived }; self.activatePowerUp = function (type) { var POWER_UP_DURATION = 300; // 5 seconds at 60 FPS if (type === 0) { // Shield self.powerUps.shield = true; tween(playerGraphic, { tint: 0x3498db }, { duration: 300 }); LK.setTimeout(function () { tween(playerGraphic, { tint: 0xffffff }, { duration: 300 }); }, 300); } else if (type === 1) { // Double fire self.powerUps.doubleFire = true; self.powerUpTimers.doubleFire = POWER_UP_DURATION; } else if (type === 2) { // Speed boost self.powerUps.speedBoost = true; self.powerUpTimers.speedBoost = POWER_UP_DURATION; self.speed = 15; // Increased speed // Reset speed when power-up expires LK.setTimeout(function () { self.speed = 10; }, POWER_UP_DURATION * (1000 / 60)); // Convert frames to milliseconds } // Play power-up collect sound LK.getSound('powerUpCollect').play(); }; return self; }); var PlayerBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphic = self.attachAsset('playerBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -15; self.update = function () { self.y += self.speed; }; return self; }); var PowerUp = Container.expand(function () { var self = Container.call(this); var powerUpGraphic = self.attachAsset('powerUp', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5; self.type = Math.floor(Math.random() * 3); // 0: Shield, 1: Double fire, 2: Speed boost // Set color based on powerup type if (self.type === 0) { powerUpGraphic.tint = 0x3498db; // Blue for shield } else if (self.type === 1) { powerUpGraphic.tint = 0xe74c3c; // Red for double fire } else { powerUpGraphic.tint = 0x2ecc71; // Green for speed boost } // Add pulse animation self.pulseDirection = 1; self.pulseValue = 0; self.update = function () { self.y += self.speed; // Pulse animation self.pulseValue += 0.05 * self.pulseDirection; if (self.pulseValue >= 1) { self.pulseDirection = -1; } else if (self.pulseValue <= 0) { self.pulseDirection = 1; } powerUpGraphic.scale.x = 1 + self.pulseValue * 0.2; powerUpGraphic.scale.y = 1 + self.pulseValue * 0.2; }; return self; }); var Star = Container.expand(function () { var self = Container.call(this); var starGraphic = self.attachAsset('star', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 1 + Math.random() * 3; self.alpha = 0.3 + Math.random() * 0.7; starGraphic.alpha = self.alpha; self.update = function () { self.y += self.speed; // Reset star position when it goes off screen if (self.y > 2732) { self.y = -10; self.x = Math.random() * 2048; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000022 }); /**** * Game Code ****/ // Game variables var player; var playerBullets = []; var enemies = []; var enemyBullets = []; var powerUps = []; var stars = []; var isGameStarted = false; var spawnRate = 120; // Enemy spawn rate (in frames) var nextSpawn = 60; var difficulty = 1; var difficultyTimer = 0; var waveNumber = 1; var dragOffset = { x: 0, y: 0 }; // UI Elements var scoreText; var highScoreText; var livesDisplay = []; var waveText; var startText; // Initialize stars function initStars() { for (var i = 0; i < 100; i++) { var star = new Star(); star.x = Math.random() * 2048; star.y = Math.random() * 2732; game.addChild(star); stars.push(star); } } // Initialize player function initPlayer() { player = new Player(); player.x = 2048 / 2; player.y = 2732 - 300; game.addChild(player); } // Initialize UI function initUI() { // Score display scoreText = new Text2('Score: 0', { size: 70, fill: 0xFFFFFF }); scoreText.anchor.set(0, 0); LK.gui.topLeft.addChild(scoreText); scoreText.x = 120; // Leave space for the menu icon scoreText.y = 20; // High score display highScoreText = new Text2('High Score: ' + storage.highScore, { size: 70, fill: 0xFFFF00 }); highScoreText.anchor.set(1, 0); LK.gui.topRight.addChild(highScoreText); highScoreText.y = 20; highScoreText.x = -20; // Wave display waveText = new Text2('Wave: 1', { size: 70, fill: 0xFFFFFF }); waveText.anchor.set(0.5, 0); LK.gui.top.addChild(waveText); waveText.y = 20; // Lives display updateLivesDisplay(); // Start text startText = new Text2('Tap to Start', { size: 100, fill: 0xFFFFFF }); startText.anchor.set(0.5, 0.5); LK.gui.center.addChild(startText); } // Update lives display function updateLivesDisplay() { // Remove existing lives display for (var i = 0; i < livesDisplay.length; i++) { LK.gui.bottomLeft.removeChild(livesDisplay[i]); } livesDisplay = []; // Create new lives display for (var i = 0; i < player.lives; i++) { var lifeIcon = LK.getAsset('playerShip', { anchorX: 0.5, anchorY: 0.5, scaleX: 0.3, scaleY: 0.3 }); lifeIcon.x = 30 + i * 50; lifeIcon.y = -30; LK.gui.bottomLeft.addChild(lifeIcon); livesDisplay.push(lifeIcon); } } // Start game function startGame() { if (!isGameStarted) { isGameStarted = true; LK.gui.center.removeChild(startText); LK.setScore(0); scoreText.setText('Score: 0'); updateLivesDisplay(); // Start background music LK.playMusic('gameBgMusic', { fade: { start: 0, end: 0.4, duration: 1000 } }); } } // Spawn enemy function spawnEnemy() { var enemy = new Enemy(); enemy.x = 100 + Math.random() * (2048 - 200); enemy.y = -100; // Adjust enemy properties based on difficulty enemy.health = Math.min(5, 1 + Math.floor(difficulty / 2)); enemy.speed = 2 + difficulty * 0.5; enemy.fireRate = Math.max(60, 120 - difficulty * 10); enemy.scoreValue = 100 * difficulty; game.addChild(enemy); enemies.push(enemy); } // Game initialization initStars(); initPlayer(); initUI(); // Touch events game.down = function (x, y, obj) { if (!isGameStarted) { startGame(); return; } dragOffset.x = x - player.x; dragOffset.y = y - player.y; // Fire when tapping player.fire(); }; game.move = function (x, y, obj) { if (!isGameStarted || !player) { return; } // Move player, but keep within screen bounds var targetX = x - dragOffset.x; var targetY = y - dragOffset.y; player.x = Math.max(75, Math.min(2048 - 75, targetX)); player.y = Math.max(75, Math.min(2732 - 75, targetY)); }; game.up = function (x, y, obj) { // Nothing specific needed for up event }; // Main game update loop game.update = function () { if (!isGameStarted) { return; } // Update score display scoreText.setText('Score: ' + LK.getScore()); // Update player if (player) { player.update(); // Auto-fire if (LK.ticks % 30 === 0) { player.fire(); } } // Update stars for (var i = 0; i < stars.length; i++) { stars[i].update(); } // Update bullets for (var i = playerBullets.length - 1; i >= 0; i--) { var bullet = playerBullets[i]; // Check if bullet is off screen if (bullet.y < -50) { bullet.destroy(); playerBullets.splice(i, 1); continue; } // Check for collision with enemies for (var j = enemies.length - 1; j >= 0; j--) { var enemy = enemies[j]; if (bullet.intersects(enemy)) { // Hit enemy var destroyed = enemy.takeDamage(); if (destroyed) { enemies.splice(j, 1); enemy.destroy(); } // Remove bullet bullet.destroy(); playerBullets.splice(i, 1); break; } } } // Update enemy bullets for (var i = enemyBullets.length - 1; i >= 0; i--) { var bullet = enemyBullets[i]; // Check if bullet is off screen if (bullet.y > 2732 + 50) { bullet.destroy(); enemyBullets.splice(i, 1); continue; } // Check for collision with player if (player && bullet.intersects(player)) { // Hit player var destroyed = player.takeDamage(); if (destroyed) { player = null; } // Remove bullet bullet.destroy(); enemyBullets.splice(i, 1); } } // Update enemies for (var i = enemies.length - 1; i >= 0; i--) { var enemy = enemies[i]; enemy.update(); // Check if enemy is off screen if (enemy.y > 2732 + 100) { enemy.destroy(); enemies.splice(i, 1); } // Check for collision with player if (player && enemy.intersects(player)) { // Hit player var destroyed = player.takeDamage(); if (destroyed) { player = null; } // Destroy enemy enemy.destroy(); enemies.splice(i, 1); } } // Update power-ups for (var i = powerUps.length - 1; i >= 0; i--) { var powerUp = powerUps[i]; powerUp.update(); // Check if power-up is off screen if (powerUp.y > 2732 + 50) { powerUp.destroy(); powerUps.splice(i, 1); continue; } // Check for collision with player if (player && powerUp.intersects(player)) { // Activate power-up player.activatePowerUp(powerUp.type); // Remove power-up powerUp.destroy(); powerUps.splice(i, 1); } } // Spawn enemies if (nextSpawn <= 0) { spawnEnemy(); nextSpawn = spawnRate; } else { nextSpawn--; } // Increase difficulty over time difficultyTimer++; if (difficultyTimer >= 600) { // Every 10 seconds (600 frames) difficultyTimer = 0; difficulty += 0.5; waveNumber = Math.floor(difficulty); waveText.setText('Wave: ' + waveNumber); } };