/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1"); /**** * Classes ****/ var Alien = Container.expand(function () { var self = Container.call(this); var alienGraphics = self.attachAsset('alien', { anchorX: 0.5, anchorY: 0.5, scaleX: 2.2, scaleY: 2.2 }); self.width = alienGraphics.width * 2.0; self.height = alienGraphics.height * 2.0; self.active = true; self.points = 10; self.canShoot = true; self.shotsFired = 0; // Counter for shots fired // Add a subtle pulsing animation to the aliens tween(alienGraphics, { scaleX: 2.4, scaleY: 2.4 }, { duration: 1000, easing: tween.easeInOut, onFinish: function onFinish() { tween(alienGraphics, { scaleX: 2.2, scaleY: 2.2 }, { duration: 1000, easing: tween.easeInOut, onFinish: function onFinish() { if (self.active) { // Repeat the animation if alien is still active tween(alienGraphics, { scaleX: 2.4, scaleY: 2.4 }, { duration: 1000, easing: tween.easeInOut }); } } }); } }); self.hit = function () { if (self.active) { self.active = false; LK.getSound('alienExplode').play(); LK.effects.flashObject(self, 0xffffff, 100); tween(self, { alpha: 0 }, { duration: 300, onFinish: function onFinish() { self.destroy(); } }); return self.points; } return 0; }; return self; }); var AlienBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('alienBullet', { anchorX: 0.5, anchorY: 0.5, scaleX: 1.8, scaleY: 1.8 }); self.speed = 8; self.active = true; self.width = bulletGraphics.width; self.height = bulletGraphics.height; self.update = function () { self.y += self.speed; if (self.y > 2800) { self.active = false; } }; return self; }); var BossAlien = Container.expand(function () { var self = Container.call(this); var alienGraphics = self.attachAsset('alien', { anchorX: 0.5, anchorY: 0.5, scaleX: 4.0, scaleY: 4.0, tint: 0xff0000 // Red tint for boss }); self.width = alienGraphics.width * 2.5; self.height = alienGraphics.height * 2.5; self.active = true; self.points = 50; // More points than regular aliens self.canShoot = true; self.shotsFired = 0; self.health = 10; // Takes 10 shots to defeat self.lastHitTime = 0; // Add a pulsing animation for the boss tween(alienGraphics, { scaleX: 4.2, scaleY: 4.2 }, { duration: 800, easing: tween.easeInOut, onFinish: function onFinish() { tween(alienGraphics, { scaleX: 4.0, scaleY: 4.0 }, { duration: 800, easing: tween.easeInOut, onFinish: function onFinish() { if (self.active) { tween(alienGraphics, { scaleX: 4.2, scaleY: 4.2 }, { duration: 800, easing: tween.easeInOut }); } } }); } }); self.hit = function () { if (self.active) { LK.getSound('alienExplode').play(); LK.effects.flashObject(self, 0xffffff, 100); self.health--; self.lastHitTime = Date.now(); // Create visual feedback for hits tween(alienGraphics, { tint: 0xffffff }, { duration: 100, onFinish: function onFinish() { tween(alienGraphics, { tint: 0xff0000 }, { duration: 100 }); } }); // Only destroy when health reaches 0 if (self.health <= 0) { self.active = false; tween(self, { alpha: 0 }, { duration: 500, onFinish: function onFinish() { self.destroy(); } }); return self.points; } return 0; // Return 0 points if not destroyed yet } return 0; }; self.update = function () { // Boss-specific update logic can be added here }; return self; }); var ExplosiveAlienBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('alienBullet', { anchorX: 0.5, anchorY: 0.5, scaleX: 2.2, scaleY: 2.2, tint: 0xff5500 // Orange-red color for explosive bullets }); self.speed = 8; self.active = true; self.width = bulletGraphics.width; self.height = bulletGraphics.height; self.isExplosive = true; // Flag to identify explosive bullets // Add pulsing effect to show it's explosive tween(bulletGraphics, { scaleX: 2.5, scaleY: 2.5 }, { duration: 300, easing: tween.easeInOut, onFinish: function onFinish() { tween(bulletGraphics, { scaleX: 2.2, scaleY: 2.2 }, { duration: 300, easing: tween.easeInOut, repeat: true }); } }); self.update = function () { self.y += self.speed; if (self.y > 2800) { self.active = false; } }; return self; }); var FastAlien = Container.expand(function () { var self = Container.call(this); var alienGraphics = self.attachAsset('alien', { anchorX: 0.5, anchorY: 0.5, scaleX: 2.0, scaleY: 2.0, tint: 0x00ffff // Cyan tint for fast aliens }); self.width = alienGraphics.width * 2.0; self.height = alienGraphics.height * 2.0; self.active = true; self.points = 50; // Worth more points than regular aliens self.speed = 20; // Very fast horizontal movement self.direction = Math.random() > 0.5 ? 1 : -1; // Random direction (left or right) // Add a stretching effect to show speed tween(alienGraphics, { scaleX: 2.3, scaleY: 1.8 }, { duration: 300, easing: tween.easeInOut, repeat: true, yoyo: true }); self.update = function () { self.x += self.speed * self.direction; // If off screen, mark as inactive if (self.direction > 0 && self.x > gameWidth + 100 || self.direction < 0 && self.x < -100) { self.active = false; } }; self.hit = function () { if (self.active) { self.active = false; LK.getSound('alienExplode').play(); LK.effects.flashObject(self, 0xffffff, 100); tween(self, { alpha: 0 }, { duration: 300, onFinish: function onFinish() { self.destroy(); } }); return self.points; } return 0; }; return self; }); var PlayerBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('playerBullet', { anchorX: 0.5, anchorY: 0.5, scaleX: 8.0, scaleY: 8.0 }); self.speed = -15; self.active = true; self.width = bulletGraphics.width * 2; self.height = bulletGraphics.height * 2; self.update = function () { self.y += self.speed; if (self.y < -50) { self.active = false; } }; return self; }); var PlayerShip = Container.expand(function () { var self = Container.call(this); var shipGraphics = self.attachAsset('playerShip', { anchorX: 0.5, anchorY: 0.5, scaleX: 80.0, scaleY: 80.0 }); self.speed = 12; self.lives = 3; self.hasShield = true; self.multiShot = false; self.width = shipGraphics.width * 2; self.height = shipGraphics.height * 2; self.shield = self.attachAsset('shield', { anchorX: 0.5, anchorY: 0.5, y: -40, alpha: 0.7, scaleX: 5.0, scaleY: 5.0 }); self.activateShield = function () { self.hasShield = true; self.shield.alpha = 0.7; }; self.deactivateShield = function () { self.hasShield = false; self.shield.alpha = 0; }; self.hit = function () { if (self.hasShield) { self.deactivateShield(); return false; } else { LK.getSound('playerHit').play(); self.lives--; LK.effects.flashObject(self, 0xff0000, 500); return true; } }; return self; }); var PowerUp = Container.expand(function () { var self = Container.call(this); var powerUpGraphics = self.attachAsset('powerUp', { anchorX: 0.5, anchorY: 0.5, scaleX: 1.8, scaleY: 1.8 }); self.type = Math.floor(Math.random() * 3); // 0: shield, 1: multishot, 2: extra life self.speed = 5; self.active = true; self.width = powerUpGraphics.width; self.height = powerUpGraphics.height; // Change color based on type if (self.type === 0) { powerUpGraphics.tint = 0x9b59b6; // Shield - purple } else if (self.type === 1) { powerUpGraphics.tint = 0xf39c12; // Multishot - orange } else { powerUpGraphics.tint = 0x2ecc71; // Extra life - green } // Add a pulsing animation for level completion power-ups if (self.type === 2) { // Extra life power-up tween(powerUpGraphics, { scaleX: 2.2, scaleY: 2.2 }, { duration: 500, easing: tween.easeInOut, onFinish: function onFinish() { tween(powerUpGraphics, { scaleX: 1.8, scaleY: 1.8 }, { duration: 500, easing: tween.easeInOut, onFinish: function onFinish() { if (self.active) { // Repeat the animation if still active tween(powerUpGraphics, { scaleX: 2.2, scaleY: 2.2 }, { duration: 500, easing: tween.easeInOut }); } } }); } }); } self.update = function () { self.y += self.speed; if (self.y > 2800) { self.active = false; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 }); /**** * Game Code ****/ // Game state variables var playerShip; var playerBullets = []; var aliens = []; var alienBullets = []; var powerUps = []; var shields = []; var gameActive = true; var score = 0; var level = 1; var alienDirection = 1; // 1 = right, -1 = left var alienMoveSpeed = 1; var alienDropAmount = 40; var alienShootChance = 0.01; var powerUpChance = 0.1; var lastShootTime = 0; var shootCooldown = 300; // ms var multiShotTimer = 0; var gameWidth = 2048; var gameHeight = 2732; var aliensKilled = 0; var bossActive = false; var boss = null; var bossSpawnThreshold = 10; // Spawn boss after 10 aliens killed // UI elements var scoreTxt; var levelTxt; var livesTxt; // Initialize game function initGame() { // Reset game state playerBullets = []; aliens = []; alienBullets = []; powerUps = []; shields = []; gameActive = true; score = 0; level = 1; alienDirection = 1; alienMoveSpeed = 1; alienShootChance = 0.01; multiShotTimer = 0; aliensKilled = 0; bossActive = false; boss = null; // Set score LK.setScore(0); // Create player ship playerShip = new PlayerShip(); playerShip.x = gameWidth / 2; playerShip.y = gameHeight - 150; game.addChild(playerShip); playerShip.activateShield(); // Activate shield immediately // Create shields createShields(); // Create UI createUI(); // Create aliens for first level createAlienWave(); // Play background music LK.playMusic('backgroundMusic'); } function createUI() { // Score text scoreTxt = new Text2('Score: 0', { size: 100, fill: 0xFFFFFF }); scoreTxt.anchor.set(0, 0); LK.gui.topLeft.addChild(scoreTxt); scoreTxt.x = 120; // Keep away from the top left menu area // Level text levelTxt = new Text2('Level: 1', { size: 100, fill: 0xFFFFFF }); levelTxt.anchor.set(0.5, 0); LK.gui.top.addChild(levelTxt); // Lives text livesTxt = new Text2('Lives: 3', { size: 100, fill: 0xFFFFFF }); livesTxt.anchor.set(1, 0); LK.gui.topRight.addChild(livesTxt); } function createShields() { // Create 4 shields across the bottom var shieldCount = 4; var shieldSpacing = gameWidth / (shieldCount + 1); for (var i = 0; i < shieldCount; i++) { var shield = game.addChild(LK.getAsset('shield', { anchorX: 0.5, anchorY: 0.5, scaleX: 1.5, scaleY: 1.5 })); shield.x = shieldSpacing * (i + 1); shield.y = gameHeight - 300; shield.health = 10; shields.push(shield); } } function createAlienWave() { // Clear any remaining aliens for (var i = aliens.length - 1; i >= 0; i--) { aliens[i].destroy(); } aliens = []; // Increase difficulty with level alienMoveSpeed = 1 + level * 0.5; alienShootChance = 0.01 + level * 0.005; // Create alien grid - rows based on level, 1 row for level 1, 2 rows for level 2, etc. up to 5 var rows = Math.min(level, 5); // Level 1-5 has corresponding number of rows var cols = 6 + Math.min(level, 4); // Max 10 columns var alienWidth = 200; // Further increased width to account for larger aliens var alienHeight = 160; // Further increased height to account for larger aliens var startX = (gameWidth - cols * alienWidth) / 2 + alienWidth / 2; var startY = 200; for (var row = 0; row < rows; row++) { for (var col = 0; col < cols; col++) { var alien = new Alien(); alien.x = startX + col * alienWidth; alien.y = startY + row * alienHeight; alien.row = row; alien.col = col; alien.points = (rows - row) * 10; // More points for aliens at the top game.addChild(alien); aliens.push(alien); } } } function playerShoot() { var now = Date.now(); if (now - lastShootTime < shootCooldown) { return; } lastShootTime = now; // Create bullet var bullet = new PlayerBullet(); bullet.x = playerShip.x; bullet.y = playerShip.y - playerShip.height / 2; game.addChild(bullet); playerBullets.push(bullet); // If player has multishot, create additional bullets if (playerShip.multiShot) { for (var i = -1; i <= 1; i += 2) { var sideBullet = new PlayerBullet(); sideBullet.x = playerShip.x + i * 20; sideBullet.y = playerShip.y - playerShip.height / 2; game.addChild(sideBullet); playerBullets.push(sideBullet); } } LK.getSound('playerShoot').play(); } function alienShoot() { // Find shooting aliens (bottom row of each column) var shootingAliens = []; var colMap = {}; for (var i = 0; i < aliens.length; i++) { var alien = aliens[i]; if (!alien.active) { continue; } // If this alien is lower than the current lowest in its column, it becomes the shooter if (!colMap[alien.col] || alien.row > colMap[alien.col].row) { colMap[alien.col] = alien; } } // Get all bottom aliens for (var col in colMap) { shootingAliens.push(colMap[col]); } // Randomly choose aliens to shoot based on difficulty for (var i = 0; i < shootingAliens.length; i++) { if (Math.random() < alienShootChance) { var shooter = shootingAliens[i]; // Increment shotsFired counter for this alien shooter.shotsFired = (shooter.shotsFired || 0) + 1; // Every 10 shots, create an explosive bullet var bullet; if (shooter.shotsFired % 10 === 0) { bullet = new ExplosiveAlienBullet(); // Add visual effect for explosive bullet firing LK.effects.flashObject(shooter, 0xff5500, 100); } else { bullet = new AlienBullet(); } bullet.x = shooter.x; bullet.y = shooter.y + shooter.height / 2; game.addChild(bullet); alienBullets.push(bullet); } } } function checkAlienMovement() { if (aliens.length === 0) { return; } var moveDown = false; var minX = gameWidth; var maxX = 0; // Find leftmost and rightmost aliens for (var i = 0; i < aliens.length; i++) { var alien = aliens[i]; if (alien.active) { minX = Math.min(minX, alien.x); maxX = Math.max(maxX, alien.x); } } // Check if aliens need to change direction if (maxX > gameWidth - 50 && alienDirection > 0 || minX < 50 && alienDirection < 0) { alienDirection *= -1; moveDown = true; } // Move aliens for (var i = 0; i < aliens.length; i++) { var alien = aliens[i]; if (alien.active) { alien.x += alienDirection * alienMoveSpeed; if (moveDown) { alien.y += alienDropAmount; // Check if aliens reached the bottom (game over condition) if (alien.y > gameHeight - 200) { gameOver(); return; } } } } } function spawnPowerUp(x, y) { if (Math.random() < powerUpChance) { var powerUp = new PowerUp(); powerUp.x = x; powerUp.y = y; game.addChild(powerUp); powerUps.push(powerUp); } } function checkCollisions() { // Player bullets vs aliens for (var i = playerBullets.length - 1; i >= 0; i--) { var bullet = playerBullets[i]; if (!bullet.active) { bullet.destroy(); playerBullets.splice(i, 1); continue; } var bulletHit = false; // Check against aliens for (var j = 0; j < aliens.length; j++) { var alien = aliens[j]; if (alien.active && bullet.intersects(alien)) { // Add points var pointsEarned = alien.hit(); score += pointsEarned; LK.setScore(score); scoreTxt.setText('Score: ' + score); // If hit is a fast alien, add extra score (on top of the 50 already earned) if (alien instanceof FastAlien) { // Add another 50 points for hitting a fast alien score += 50; LK.setScore(score); scoreTxt.setText('Score: ' + score); // Create visual feedback for the bonus var bonusText = new Text2('+50!', { size: 80, fill: 0x00ffff }); bonusText.x = alien.x; bonusText.y = alien.y; bonusText.anchor.set(0.5, 0.5); game.addChild(bonusText); tween(bonusText, { y: bonusText.y - 100, alpha: 0 }, { duration: 1000, onFinish: function onFinish() { bonusText.destroy(); } }); } // Chance to spawn power up spawnPowerUp(alien.x, alien.y); // Remove alien from array if no longer active if (!alien.active) { aliens.splice(j, 1); // Increment aliens killed counter aliensKilled++; // Check if we should spawn a boss if (!bossActive && aliensKilled >= bossSpawnThreshold) { spawnBoss(); } } // Remove bullet bullet.destroy(); playerBullets.splice(i, 1); bulletHit = true; break; } } // If already hit an alien, skip further checks if (bulletHit) { continue; } // Check against boss if active if (bossActive && boss && boss.active && bullet.intersects(boss)) { var bossPoints = boss.hit(); if (bossPoints > 0) { // Boss was destroyed score += bossPoints; LK.setScore(score); scoreTxt.setText('Score: ' + score); // Spawn power up when boss is destroyed spawnPowerUp(boss.x, boss.y); spawnPowerUp(boss.x - 50, boss.y); // Extra powerups for boss spawnPowerUp(boss.x + 50, boss.y); bossActive = false; boss = null; } bullet.destroy(); playerBullets.splice(i, 1); bulletHit = true; continue; } // Player bullets should pass through shields // No need to check player bullets against shields } // Alien bullets vs player for (var i = alienBullets.length - 1; i >= 0; i--) { var bullet = alienBullets[i]; if (!bullet.active) { bullet.destroy(); alienBullets.splice(i, 1); continue; } // Check against player if (bullet.intersects(playerShip)) { var playerDamaged = playerShip.hit(); // Update lives display livesTxt.setText('Lives: ' + playerShip.lives); // Check for game over if (playerShip.lives <= 0) { gameOver(); } bullet.destroy(); alienBullets.splice(i, 1); continue; } // Check against shields for (var j = 0; j < shields.length; j++) { var shield = shields[j]; if (shield.health > 0 && bullet.intersects(shield)) { // Explosive bullets do 2 damage instead of 1 if (bullet.isExplosive) { shield.health -= 2; // Visual explosion effect LK.effects.flashObject(shield, 0xff5500, 200); } else { shield.health--; } shield.alpha = shield.health / 3; if (shield.health <= 0) { shield.alpha = 0; } bullet.destroy(); alienBullets.splice(i, 1); break; } } } // Power-ups vs player for (var i = powerUps.length - 1; i >= 0; i--) { var powerUp = powerUps[i]; if (!powerUp.active) { powerUp.destroy(); powerUps.splice(i, 1); continue; } if (powerUp.intersects(playerShip)) { LK.getSound('powerUpCollect').play(); // Apply power-up effect if (powerUp.type === 0) { // Shield playerShip.activateShield(); } else if (powerUp.type === 1) { // Multi-shot playerShip.multiShot = true; multiShotTimer = 300; // Duration in ticks (5 seconds at 60fps) } else { // Extra life playerShip.lives++; livesTxt.setText('Lives: ' + playerShip.lives); } powerUp.destroy(); powerUps.splice(i, 1); } } } function checkLevelComplete() { // Check if there are any regular aliens left (not fast aliens) var regularAliensLeft = false; for (var i = 0; i < aliens.length; i++) { if (!(aliens[i] instanceof FastAlien)) { regularAliensLeft = true; break; } } if (!regularAliensLeft) { level++; levelTxt.setText('Level: ' + level); // Spawn power-ups on both sides of the player after level completion spawnLevelCompletionPowerUp(); createAlienWave(); } } function spawnLevelCompletionPowerUp() { // Create two power-ups, one on each side of the player var leftPowerUp = new PowerUp(); var rightPowerUp = new PowerUp(); // Force the type to be extra life (type 2) leftPowerUp.type = 2; rightPowerUp.type = 2; // Set their color to green (extra life color) leftPowerUp.getChildAt(0).tint = 0x2ecc71; rightPowerUp.getChildAt(0).tint = 0x2ecc71; // Position them on either side of the player var offset = 200; // Distance from player leftPowerUp.x = playerShip.x - offset; leftPowerUp.y = playerShip.y; rightPowerUp.x = playerShip.x + offset; rightPowerUp.y = playerShip.y; // Add them to the game game.addChild(leftPowerUp); game.addChild(rightPowerUp); powerUps.push(leftPowerUp); powerUps.push(rightPowerUp); // Add a visual effect to highlight them LK.effects.flashObject(leftPowerUp, 0x2ecc71, 500); LK.effects.flashObject(rightPowerUp, 0x2ecc71, 500); } function gameOver() { gameActive = false; LK.effects.flashScreen(0xff0000, 1000); LK.stopMusic(); LK.showGameOver(); } // Touch controls var touchX = null; game.down = function (x, y, obj) { touchX = x; playerShoot(); }; game.up = function (x, y, obj) { touchX = null; }; game.move = function (x, y, obj) { if (touchX !== null) { touchX = x; } }; // Game update loop game.update = function () { if (!gameActive) { return; } // Process player movement from touch if (touchX !== null) { // Move player toward touch position var moveDir = touchX > playerShip.x ? 1 : -1; if (Math.abs(touchX - playerShip.x) > 5) { playerShip.x += moveDir * playerShip.speed; } // Keep player in bounds if (playerShip.x < playerShip.width / 2) { playerShip.x = playerShip.width / 2; } if (playerShip.x > gameWidth - playerShip.width / 2) { playerShip.x = gameWidth - playerShip.width / 2; } } // Update multishot timer if (playerShip.multiShot) { multiShotTimer--; if (multiShotTimer <= 0) { playerShip.multiShot = false; } } // Update game objects checkAlienMovement(); // Update fast aliens manually as they have their own movement pattern for (var i = 0; i < aliens.length; i++) { if (aliens[i] instanceof FastAlien && aliens[i].active) { aliens[i].update(); } } // Boss update logic if (bossActive && boss && boss.active) { // Make boss move side to side independently boss.x += Math.sin(LK.ticks / 60) * 3; // Gentle sine wave movement // Make boss shoot more frequently if (LK.ticks % 180 === 0) { // Every 3 seconds var bullet = new ExplosiveAlienBullet(); bullet.x = boss.x; bullet.y = boss.y + boss.height / 2; game.addChild(bullet); alienBullets.push(bullet); // Sometimes fire a spread of bullets if (Math.random() < 0.5) { for (var i = -1; i <= 1; i += 2) { var sideBullet = new AlienBullet(); sideBullet.x = boss.x + i * 40; sideBullet.y = boss.y + boss.height / 2; game.addChild(sideBullet); alienBullets.push(sideBullet); } } } // Update boss custom logic if any if (boss.update) { boss.update(); } } // Alien shooting if (LK.ticks % 300 === 0) { // Check every 5 seconds alienShoot(); } // Automatic player shooting every 2 seconds (120 ticks at 60fps) if (LK.ticks % 120 === 0) { playerShoot(); } // Update bullets for (var i = 0; i < playerBullets.length; i++) { playerBullets[i].update(); } for (var i = 0; i < alienBullets.length; i++) { alienBullets[i].update(); } // Update power-ups for (var i = 0; i < powerUps.length; i++) { powerUps[i].update(); } // Check collisions checkCollisions(); // Check if level is complete checkLevelComplete(); }; // Initialize the game initGame(); // Function to spawn fast aliens function spawnFastAlien() { var fastAlien = new FastAlien(); // Set starting position - either left or right edge of screen if (fastAlien.direction > 0) { // Moving right to left fastAlien.x = -50; } else { // Moving left to right fastAlien.x = gameWidth + 50; } // Random Y position in the top half of the screen fastAlien.y = Math.random() * (gameHeight / 2) + 100; game.addChild(fastAlien); aliens.push(fastAlien); // Visual effect for fast alien spawn LK.effects.flashObject(fastAlien, 0x00ffff, 200); } // Set interval to spawn fast aliens every 5 seconds (300 frames at 60fps) LK.setInterval(spawnFastAlien, 5000); function spawnBoss() { bossActive = true; boss = new BossAlien(); // Find the back row position var backRow = 0; var startX = gameWidth / 2; var startY = 200; // If there are aliens, position the boss behind them if (aliens.length > 0) { for (var i = 0; i < aliens.length; i++) { if (aliens[i].row < backRow) { backRow = aliens[i].row; } } backRow = backRow - 1; // Position boss one row behind furthest back row if (backRow < 0) { backRow = 0; } startY = 200 + backRow * 160; // Use same spacing as alien rows } boss.x = startX; boss.y = startY; boss.row = backRow; boss.col = -1; // Special column marker for boss game.addChild(boss); // Visual effect for boss spawn LK.effects.flashObject(boss, 0xffff00, 500); }