/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1", { highScore: 0 }); /**** * Classes ****/ var BossShip = Container.expand(function () { var self = Container.call(this); var shipGraphic = self.attachAsset('bossShip', { anchorX: 0.5, anchorY: 0.5 }); self.health = 20; self.maxHealth = 20; self.speed = 1; self.score = 500; self.fireCounter = 0; self.fireRate = 30; self.entryComplete = false; self.movementDirection = 1; // 1 = right, -1 = left self.update = function () { var bullets = []; if (!self.entryComplete) { self.y += self.speed; if (self.y >= 300) { self.entryComplete = true; } } else { // Side to side movement self.x += self.speed * 2 * self.movementDirection; // Reverse direction at screen edges if (self.x > 1848 || self.x < 200) { self.movementDirection *= -1; } // Fire pattern self.fireCounter++; if (self.fireCounter >= self.fireRate) { self.fireCounter = 0; LK.getSound('bossShotSound').play(); // Fire 3 bullets in a spread for (var i = -1; i <= 1; i++) { var bullet = new EnemyBullet(); bullet.x = self.x + i * 50; bullet.y = self.y + 75; bullet.speedX = i * 2; bullets.push(bullet); } } } return bullets; }; self.hit = function (damage) { self.health -= damage; // Flash red when hit tween(shipGraphic, { tint: 0xffcccc }, { duration: 100, onFinish: function onFinish() { tween(shipGraphic, { tint: 0xffffff }, { duration: 100 }); } }); if (self.health <= 0) { return true; // Boss is destroyed } return false; }; 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 = 8; self.speedX = 0; self.update = function () { self.y += self.speed; self.x += self.speedX; }; return self; }); var EnemyShip = Container.expand(function () { var self = Container.call(this); var shipGraphic = self.attachAsset('enemyShip', { anchorX: 0.5, anchorY: 0.5 }); self.health = 1; self.speed = 3; self.score = 10; self.fireChance = 0.01; self.movementPattern = 0; // 0 = straight down, 1 = sine wave self.movementOffset = 0; self.initialX = 0; self.update = function () { if (self.movementPattern === 0) { // Move straight down self.y += self.speed; } else if (self.movementPattern === 1) { // Sine wave movement self.movementOffset += 0.05; self.x = self.initialX + Math.sin(self.movementOffset) * 150; self.y += self.speed; } // Random firing if (Math.random() < self.fireChance && self.y > 0 && self.y < 2732) { var bullet = new EnemyBullet(); bullet.x = self.x; bullet.y = self.y + 40; return bullet; } return null; }; self.hit = function (damage) { self.health -= damage; if (self.health <= 0) { return true; // Enemy is destroyed } return false; }; 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.power = 1; self.update = function () { self.y -= self.speed; }; return self; }); var PlayerShip = Container.expand(function () { var self = Container.call(this); var shipGraphic = self.attachAsset('playerShip', { anchorX: 0.5, anchorY: 0.5 }); self.fireRate = 10; self.fireCounter = 0; self.canFire = true; self.isShielded = false; self.shieldDuration = 0; self.shieldGraphic = null; self.activateShield = function (duration) { if (self.shieldGraphic === null) { self.shieldGraphic = self.attachAsset('shield', { anchorX: 0.5, anchorY: 0.5, alpha: 0.4 }); } self.isShielded = true; self.shieldDuration = duration; self.shieldGraphic.visible = true; }; self.update = function () { if (self.fireCounter > 0) { self.fireCounter--; if (self.fireCounter <= 0) { self.canFire = true; } } if (self.isShielded) { self.shieldDuration--; if (self.shieldDuration <= 0) { self.isShielded = false; self.shieldGraphic.visible = false; } } }; self.fire = function () { if (!self.canFire) { return null; } self.canFire = false; self.fireCounter = self.fireRate; LK.getSound('shoot').play(); var bullet = new PlayerBullet(); bullet.x = self.x; bullet.y = self.y - 50; return bullet; }; self.down = function (x, y, obj) { // This is handled in the game object via dragging }; 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 = 4; self.type = Math.floor(Math.random() * 3); // 0 = rapid fire, 1 = shield, 2 = double damage // Set color based on type if (self.type === 0) { powerUpGraphic.tint = 0xff0000; // Red for rapid fire } else if (self.type === 1) { powerUpGraphic.tint = 0x0000ff; // Blue for shield } else if (self.type === 2) { powerUpGraphic.tint = 0xffff00; // Yellow for double damage } // Add pulsing animation tween(powerUpGraphic, { alpha: 0.6 }, { duration: 500, onFinish: function onFinish() { tween(powerUpGraphic, { alpha: 1 }, { duration: 500, onFinish: function onFinish() { if (self.parent) { // Check if still in the scene self.update(); // Restart pulsing } } }); } }); self.update = function () { self.y += self.speed; // Add gentle floating motion self.x += Math.sin(LK.ticks * 0.05) * 0.8; }; 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 = Math.random() * 3 + 1; self.update = function () { self.y += self.speed; 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 boss = null; var stars = []; var gameActive = true; var spawnCounter = 0; var waveCounter = 0; var difficultyLevel = 1; var bossSpawnScore = 2000; var dragTarget = null; var rapidFireTimer = 0; var doubleDamageTimer = 0; // Game UI var scoreText = new Text2('0', { size: 80, fill: 0xFFFFFF }); scoreText.anchor.set(0, 0); LK.gui.topRight.addChild(scoreText); scoreText.x = -250; // Offset from the right edge scoreText.y = 40; var highScoreText = new Text2('HIGH: 0', { size: 40, fill: 0xFFFF00 }); highScoreText.anchor.set(0, 0); LK.gui.topRight.addChild(highScoreText); highScoreText.x = -250; // Offset from the right edge highScoreText.y = 130; highScoreText.setText('HIGH: ' + storage.highScore); var powerUpText = new Text2('', { size: 40, fill: 0x00FFFF }); powerUpText.anchor.set(0, 0); LK.gui.topLeft.addChild(powerUpText); powerUpText.x = 120; // Keep away from the menu icon powerUpText.y = 40; // Create the background stars function createStars() { for (var i = 0; i < 100; i++) { var star = new Star(); star.x = Math.random() * 2048; star.y = Math.random() * 2732; stars.push(star); game.addChild(star); } } // Initialize the player function initializePlayer() { player = new PlayerShip(); player.x = 2048 / 2; player.y = 2732 - 200; game.addChild(player); } // Spawn enemies based on difficulty function spawnEnemies() { spawnCounter++; // Increase spawn rate with difficulty if (spawnCounter >= Math.max(20, 60 - difficultyLevel * 5)) { spawnCounter = 0; waveCounter++; // Number of enemies increases with difficulty var enemyCount = Math.min(5, 1 + Math.floor(difficultyLevel / 2)); for (var i = 0; i < enemyCount; i++) { var enemy = new EnemyShip(); enemy.x = 200 + Math.random() * (2048 - 400); enemy.y = -100 - i * 80; // Increase difficulty with waves enemy.health = Math.min(3, 1 + Math.floor(difficultyLevel / 5)); enemy.speed = Math.min(7, 3 + difficultyLevel * 0.2); enemy.score = 10 + difficultyLevel * 2; enemy.fireChance = Math.min(0.03, 0.01 + difficultyLevel * 0.002); // Add movement pattern variety as difficulty increases if (difficultyLevel > 3 && Math.random() < 0.3) { enemy.movementPattern = 1; enemy.initialX = enemy.x; } enemies.push(enemy); game.addChild(enemy); } // Randomly spawn power-ups if (Math.random() < 0.15) { spawnPowerUp(); } // Spawn boss every X points if (LK.getScore() >= bossSpawnScore && boss === null) { spawnBoss(); bossSpawnScore += 3000; // Next boss at higher score } } } function spawnBoss() { boss = new BossShip(); boss.x = 2048 / 2; boss.y = -200; boss.health = 20 + difficultyLevel * 5; boss.maxHealth = boss.health; game.addChild(boss); } function spawnPowerUp() { var powerUp = new PowerUp(); powerUp.x = 200 + Math.random() * (2048 - 400); powerUp.y = -50; powerUps.push(powerUp); game.addChild(powerUp); } function updatePowerUpStatus() { var statusText = ""; if (rapidFireTimer > 0) { statusText += "RAPID FIRE: " + Math.ceil(rapidFireTimer / 60) + "s "; } if (doubleDamageTimer > 0) { statusText += "2X DAMAGE: " + Math.ceil(doubleDamageTimer / 60) + "s "; } if (player.isShielded) { statusText += "SHIELD: " + Math.ceil(player.shieldDuration / 60) + "s"; } powerUpText.setText(statusText); } function updateGameDifficulty() { // Increase difficulty with score difficultyLevel = 1 + Math.floor(LK.getScore() / 500); } function checkCollisions() { // Check player bullet collisions with enemies for (var i = playerBullets.length - 1; i >= 0; i--) { var bullet = playerBullets[i]; // Check bullet against enemies for (var j = enemies.length - 1; j >= 0; j--) { var enemy = enemies[j]; if (bullet.intersects(enemy)) { // Calculate damage based on power-ups var damage = bullet.power; if (doubleDamageTimer > 0) { damage *= 2; } // Handle enemy hit if (enemy.hit(damage)) { // Enemy destroyed LK.getSound('explosion').play(); LK.setScore(LK.getScore() + enemy.score); scoreText.setText(LK.getScore()); // Update high score if needed if (LK.getScore() > storage.highScore) { storage.highScore = LK.getScore(); highScoreText.setText('HIGH: ' + storage.highScore); } // Apply destruction effect LK.effects.flashObject(enemy, 0xffffff, 200); // Remove enemy enemy.destroy(); enemies.splice(j, 1); } else { // Enemy damaged but not destroyed LK.effects.flashObject(enemy, 0xff0000, 200); } // Remove bullet bullet.destroy(); playerBullets.splice(i, 1); break; } } // Check bullet against boss if (bullet && boss && bullet.intersects(boss)) { // Calculate damage based on power-ups var bossDamage = bullet.power; if (doubleDamageTimer > 0) { bossDamage *= 2; } // Handle boss hit if (boss.hit(bossDamage)) { // Boss destroyed LK.getSound('explosion').play(); LK.setScore(LK.getScore() + boss.score); scoreText.setText(LK.getScore()); // Update high score if needed if (LK.getScore() > storage.highScore) { storage.highScore = LK.getScore(); highScoreText.setText('HIGH: ' + storage.highScore); } // Apply destruction effect LK.effects.flashObject(boss, 0xffffff, 500); // Remove boss boss.destroy(); boss = null; } // Remove bullet if (bullet && bullet.parent) { bullet.destroy(); playerBullets.splice(i, 1); } } } // Check enemy collisions with player for (var i = enemies.length - 1; i >= 0; i--) { var enemy = enemies[i]; if (player && enemy.intersects(player)) { if (player.isShielded) { // Shield absorbs the hit LK.effects.flashObject(player.shieldGraphic, 0x0088ff, 200); // Remove enemy LK.getSound('explosion').play(); LK.setScore(LK.getScore() + enemy.score); scoreText.setText(LK.getScore()); enemy.destroy(); enemies.splice(i, 1); } else { // Player hit by enemy handlePlayerDeath(); return; // Exit early since player is destroyed } } } // Check enemy bullets against player for (var i = enemyBullets.length - 1; i >= 0; i--) { var bullet = enemyBullets[i]; if (player && bullet.intersects(player)) { if (player.isShielded) { // Shield absorbs the hit LK.effects.flashObject(player.shieldGraphic, 0x0088ff, 200); } else { // Player hit by bullet handlePlayerDeath(); return; // Exit early since player is destroyed } // Remove bullet either way bullet.destroy(); enemyBullets.splice(i, 1); } } // Check boss collision with player if (boss && player && boss.intersects(player)) { if (player.isShielded) { // Shield absorbs the hit LK.effects.flashObject(player.shieldGraphic, 0x0088ff, 200); LK.effects.flashObject(boss, 0xff0000, 200); // Boss takes minor damage from shield contact boss.hit(1); } else { // Player hit by boss handlePlayerDeath(); return; } } // Check power-up collisions with player for (var i = powerUps.length - 1; i >= 0; i--) { var powerUp = powerUps[i]; if (player && powerUp.intersects(player)) { // Apply power-up effect LK.getSound('powerup').play(); if (powerUp.type === 0) { // Rapid fire rapidFireTimer = 600; // 10 seconds at 60fps player.fireRate = 5; // Faster firing rate } else if (powerUp.type === 1) { // Shield player.activateShield(600); // 10 seconds at 60fps } else if (powerUp.type === 2) { // Double damage doubleDamageTimer = 600; // 10 seconds at 60fps } // Remove power-up powerUp.destroy(); powerUps.splice(i, 1); } } } function handlePlayerDeath() { if (!gameActive) { return; } gameActive = false; LK.effects.flashObject(player, 0xff0000, 500); LK.effects.flashScreen(0xff0000, 1000); // Set a timeout to show game over LK.setTimeout(function () { LK.showGameOver(); }, 1000); } function cleanupOffscreenElements() { // Clean up bullets that go off screen for (var i = playerBullets.length - 1; i >= 0; i--) { if (playerBullets[i].y < -50) { playerBullets[i].destroy(); playerBullets.splice(i, 1); } } // Clean up enemies that go off screen for (var i = enemies.length - 1; i >= 0; i--) { if (enemies[i].y > 2732 + 100) { enemies[i].destroy(); enemies.splice(i, 1); } } // Clean up enemy bullets that go off screen for (var i = enemyBullets.length - 1; i >= 0; i--) { if (enemyBullets[i].y > 2732 + 50 || enemyBullets[i].x < -50 || enemyBullets[i].x > 2048 + 50) { enemyBullets[i].destroy(); enemyBullets.splice(i, 1); } } // Clean up power-ups that go off screen for (var i = powerUps.length - 1; i >= 0; i--) { if (powerUps[i].y > 2732 + 50) { powerUps[i].destroy(); powerUps.splice(i, 1); } } } // Handle player movement through dragging function handleDrag(x, y) { if (dragTarget && gameActive) { dragTarget.x = x; dragTarget.y = y; // Keep player within bounds dragTarget.x = Math.max(50, Math.min(2048 - 50, dragTarget.x)); dragTarget.y = Math.max(50, Math.min(2732 - 50, dragTarget.y)); } } // Game input handlers game.down = function (x, y, obj) { if (gameActive && player) { dragTarget = player; handleDrag(x, y); } }; game.up = function (x, y, obj) { dragTarget = null; }; game.move = function (x, y, obj) { handleDrag(x, y); }; // Initialize game createStars(); initializePlayer(); LK.playMusic('gameMusic', { fade: { start: 0, end: 0.8, duration: 1000 } }); // Main game loop game.update = function () { if (!gameActive) { return; } // Update all game elements player.update(); // Handle player shooting if (LK.ticks % player.fireRate === 0) { var bullet = player.fire(); if (bullet) { playerBullets.push(bullet); game.addChild(bullet); } } // Update all player bullets for (var i = 0; i < playerBullets.length; i++) { playerBullets[i].update(); } // Update all enemies for (var i = 0; i < enemies.length; i++) { var enemyBullet = enemies[i].update(); if (enemyBullet) { enemyBullets.push(enemyBullet); game.addChild(enemyBullet); } } // Update boss if present if (boss) { var bossBullets = boss.update(); if (bossBullets) { for (var i = 0; i < bossBullets.length; i++) { enemyBullets.push(bossBullets[i]); game.addChild(bossBullets[i]); } } } // Update all enemy bullets for (var i = 0; i < enemyBullets.length; i++) { enemyBullets[i].update(); } // Update all power-ups for (var i = 0; i < powerUps.length; i++) { powerUps[i].update(); } // Update all stars for (var i = 0; i < stars.length; i++) { stars[i].update(); } // Update power-up timers if (rapidFireTimer > 0) { rapidFireTimer--; if (rapidFireTimer === 0) { player.fireRate = 10; // Reset to normal fire rate } } if (doubleDamageTimer > 0) { doubleDamageTimer--; } // Update UI updatePowerUpStatus(); // Spawn new enemies spawnEnemies(); // Check for collisions checkCollisions(); // Clean up off-screen elements cleanupOffscreenElements(); // Update game difficulty updateGameDifficulty(); };