/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -8; self.update = function () { self.x += self.speed; // Remove if off screen if (self.x < -50) { self.destroy(); var index = enemyBullets.indexOf(self); if (index !== -1) { enemyBullets.splice(index, 1); } } }; return self; }); var EnemyShip = Container.expand(function () { var self = Container.call(this); var shipGraphics = self.attachAsset('enemyShip', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -0.75; self.health = 1; self.shootCooldown = Math.floor(Math.random() * 120) + 60; self.scoreValue = 10; self.update = function () { self.x += self.speed; tween(self, { y: self.y + Math.sin(LK.ticks / 20) * 5 }, { duration: 1000, easing: tween.linear }); // Basic AI - shoot randomly if (self.shootCooldown > 0) { self.shootCooldown--; if (self.shootCooldown <= 0) { self.shoot(); self.shootCooldown = Math.floor(Math.random() * 180) + 120; } } // Remove if off screen if (self.x < -100) { self.destroy(); var index = enemies.indexOf(self); if (index !== -1) { enemies.splice(index, 1); } } }; self.shoot = function () { var bullet = new EnemyBullet(); bullet.x = self.x - 20; bullet.y = self.y; game.addChild(bullet); enemyBullets.push(bullet); LK.getSound('enemyShoot').play(); }; self.takeDamage = function () { self.health = 0; if (self.health <= 0) { // Create explosion var explosion = new Explosion(); explosion.x = self.x; explosion.y = self.y; game.addChild(explosion); // Remove from game self.destroy(); var index = enemies.indexOf(self); if (index !== -1) { enemies.splice(index, 1); } // Add score LK.setScore(LK.getScore() + self.scoreValue); updateScoreDisplay(); } else { // Flash red LK.effects.flashObject(self, 0xff0000, 200); } }; return self; }); var Explosion = Container.expand(function () { var self = Container.call(this); var explosionGraphics = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5, alpha: 0.8 }); self.lifetime = 30; // Half a second at 60fps self.update = function () { self.lifetime--; // Scale up explosion self.scale.x = 1 + (30 - self.lifetime) / 15; self.scale.y = self.scale.x; // Fade out self.alpha = self.lifetime / 30; // Remove when done if (self.lifetime <= 0) { self.destroy(); } }; // Play explosion sound LK.getSound('explosion').play(); return self; }); var PlayerBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('playerBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 15; self.update = function () { self.x += self.speed; // Remove if off screen if (self.x > 2048 + 50) { self.destroy(); var index = playerBullets.indexOf(self); if (index !== -1) { playerBullets.splice(index, 1); } } }; return self; }); var PlayerShip = Container.expand(function () { var self = Container.call(this); var shipGraphics = self.attachAsset('playerShip', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5; self.health = 3; self.shootCooldown = 0; self.powerUpTime = 0; self.isPoweredUp = false; self.update = function () { if (self.shootCooldown > 0) { self.shootCooldown--; } else { self.shoot(); // Auto-shoot when cooldown is 0 } if (self.powerUpTime > 0) { self.powerUpTime--; if (self.powerUpTime <= 0) { self.isPoweredUp = false; shipGraphics.tint = 0xffffff; } } }; self.shoot = function () { if (self.shootCooldown <= 0) { var bullet = new PlayerBullet(); bullet.x = self.x + 50; bullet.y = self.y; game.addChild(bullet); playerBullets.push(bullet); LK.getSound('playerShoot').play(); self.shootCooldown = self.isPoweredUp ? 10 : 60; } }; self.applyPowerUp = function () { self.isPoweredUp = true; self.powerUpTime = 600; // 10 seconds at 60fps shipGraphics.tint = 0x33ffff; LK.getSound('powerUp').play(); }; self.takeDamage = function () { if (!self.invulnerable) { self.health--; // Flash the player ship red LK.effects.flashObject(self, 0xff0000, 500); // Make the player temporarily invulnerable self.invulnerable = true; LK.setTimeout(function () { self.invulnerable = false; }, 1500); // Update the health display updateHealthDisplay(); // Check for game over if (self.health <= 0) { LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); } } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 }); /**** * Game Code ****/ var background = LK.getAsset('background', { anchorX: 0.5, anchorY: 0.5 }); background.x = 2048 / 2; background.y = 2732 / 2; game.addChild(background); // Game variables var player; var playerBullets = []; var enemies = []; var enemyBullets = []; var spawnTimer = 0; var waveSize = 3; var waveDifficulty = 1; var waveNumber = 0; var isGameStarted = false; // UI elements var scoreTxt; var healthDisplay = []; var waveTxt; // Initialize player function initializePlayer() { player = new PlayerShip(); player.x = 200; player.y = 2732 / 2; game.addChild(player); } // Initialize UI function initializeUI() { // Score display 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; // Health display updateHealthDisplay(); // Wave display waveTxt = new Text2('Wave: 1', { size: 60, fill: 0xFFFFFF }); waveTxt.anchor.set(0.5, 0); LK.gui.top.addChild(waveTxt); waveTxt.y = 20; } // Update score display function updateScoreDisplay() { scoreTxt.setText('Score: ' + LK.getScore()); } // Update health display function updateHealthDisplay() { // Clear existing health icons for (var i = 0; i < healthDisplay.length; i++) { healthDisplay[i].destroy(); } healthDisplay = []; // Create new health icons for (var i = 0; i < player.health; i++) { var healthIcon = LK.getAsset('playerShip', { anchorX: 0, anchorY: 0, scaleX: 0.4, scaleY: 0.4 }); healthIcon.x = 120 + i * 40; healthIcon.y = 20; LK.gui.top.addChild(healthIcon); healthDisplay.push(healthIcon); } } // Update wave display function updateWaveDisplay() { waveTxt.setText('Wave: ' + waveNumber); } // Spawn a wave of enemies function spawnEnemyWave() { waveNumber++; updateWaveDisplay(); for (var i = 0; i < waveSize; i++) { var enemy = new EnemyShip(); enemy.x = 2048 + 100 + i * 150; enemy.y = Math.random() * (2732 - 200) + 100; // Increase difficulty with each wave enemy.health = Math.ceil(waveDifficulty / 2); enemy.speed = -3 - waveDifficulty * 0.5; enemy.scoreValue = 10 * waveDifficulty; game.addChild(enemy); enemies.push(enemy); } // Increase difficulty for next wave if (waveNumber % 3 === 0) { waveDifficulty++; waveSize = Math.min(waveSize + 1, 8); } } // Start the game function startGame() { waveNumber = 0; waveDifficulty = 1; initializePlayer(); initializeUI(); spawnEnemyWave(); isGameStarted = true; // Play background music LK.playMusic('bgMusic', { fade: { start: 0, end: 0.4, duration: 1000 } }); } // Input handlers game.down = function (x, y, obj) { if (!isGameStarted) { startGame(); return; } // Shoot when player taps player.shoot(); }; game.move = function (x, y, obj) { if (!player || !isGameStarted) { return; } // Move player vertically based on touch position // Clamp position to keep player on screen var gameY = y; player.y = Math.max(100, Math.min(2732 - 100, gameY)); }; // Main game update loop game.update = function () { if (!isGameStarted) { return; } // Spawn timer spawnTimer++; if (enemies.length === 0 && spawnTimer > 120) { spawnEnemyWave(); spawnTimer = 0; } // Update player player.update(); // Update player bullets for (var i = playerBullets.length - 1; i >= 0; i--) { playerBullets[i].update(); } // Update enemies for (var i = enemies.length - 1; i >= 0; i--) { enemies[i].update(); } // Update enemy bullets for (var i = enemyBullets.length - 1; i >= 0; i--) { enemyBullets[i].update(); } // Check collisions checkCollisions(); }; // Check for all collisions function checkCollisions() { // Player bullets hitting enemies for (var i = playerBullets.length - 1; i >= 0; i--) { var bullet = playerBullets[i]; for (var j = enemies.length - 1; j >= 0; j--) { var enemy = enemies[j]; if (bullet.intersects(enemy)) { enemy.takeDamage(); // Remove bullet bullet.destroy(); playerBullets.splice(i, 1); break; } } } // Enemy bullets hitting player for (var i = enemyBullets.length - 1; i >= 0; i--) { var bullet = enemyBullets[i]; if (bullet.intersects(player)) { player.takeDamage(); // Remove bullet bullet.destroy(); enemyBullets.splice(i, 1); } } // Enemies colliding with player for (var i = enemies.length - 1; i >= 0; i--) { var enemy = enemies[i]; if (enemy.intersects(player)) { player.takeDamage(); enemy.takeDamage(); } } } // Create a start message var startMessage = new Text2('Tap to Start', { size: 100, fill: 0xFFFFFF }); startMessage.anchor.set(0.5, 0.5); LK.gui.center.addChild(startMessage); // Hide start message when game starts game.on('down', function () { if (!isGameStarted) { startMessage.destroy(); } });