/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1", { highScore: 0, lastScore: 0 }); /**** * Classes ****/ var AlienShip = Container.expand(function () { var self = Container.call(this); self.shipGraphics = self.attachAsset('alienShip', { anchorX: 0.5, anchorY: 0.5 }); self.speedX = -3; self.speedY = 2; self.health = 8; self.score = 300; self.shootTimer = 0; self.shootInterval = 90; // 1.5 seconds at 60fps self.directionChangeTimer = 0; self.directionChangeInterval = 120; // 2 seconds self.lastY = 0; self.lastPlayerIntersecting = false; self.update = function () { self.x += self.speedX; self.y += self.speedY; // Change direction periodically self.directionChangeTimer++; if (self.directionChangeTimer >= self.directionChangeInterval) { self.speedY = -self.speedY; self.directionChangeTimer = 0; } // Boundary checking if (self.y <= 200) { self.speedY = Math.abs(self.speedY); } else if (self.y >= 2500) { self.speedY = -Math.abs(self.speedY); } // Shooting logic - aim at player self.shootTimer++; if (self.shootTimer >= self.shootInterval) { self.shootTimer = 0; self.shootAtPlayer(); } // Auto destroy when off screen if (self.x < -150) { self.destroy(); } }; self.shootAtPlayer = function () { if (!game || !game.player) { return; } var speed = 12; // Create bullets in four directions: up, down, left, right var directions = [{ speedX: 0, speedY: -speed }, // Up { speedX: 0, speedY: speed }, // Down { speedX: -speed, speedY: 0 }, // Left { speedX: speed, speedY: 0 } // Right ]; for (var i = 0; i < directions.length; i++) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; bullet.speed = directions[i].speedX; bullet.speedY = directions[i].speedY; bullet.isPlayerBullet = false; bullet.bulletGraphics.tint = 0x00ff00; // Green alien bullets // Custom update for four-directional movement bullet.update = function () { this.x += this.speed; this.y += this.speedY; // Off screen check if (this.x < -100 || this.y < -100 || this.y > 2832 || this.x > 2148) { this.destroy(); } }; game.addChild(bullet); game.enemyBullets.push(bullet); } LK.getSound('shoot').play(); }; self.takeDamage = function (damage) { self.health -= damage; // Flash red when taking damage LK.effects.flashObject(self, 0xff0000, 200); if (self.health <= 0) { // Explosion effect LK.getSound('explosion').play(); LK.effects.flashObject(self, 0xffffff, 300); // Add score game.increaseScore(self.score); // Potentially drop powerup (25% chance) if (Math.random() < 0.25) { game.spawnPowerup(self.x, self.y); } self.destroy(); } }; return self; }); var Bullet = Container.expand(function () { var self = Container.call(this); self.bulletGraphics = self.attachAsset('bullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 20; self.damage = 1; self.isPlayerBullet = true; self.update = function () { self.x += self.speed; // Auto destroy when off screen if (self.x > 2148) { self.destroy(); } }; return self; }); var Enemy = Container.expand(function () { var self = Container.call(this); self.enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.speedX = -5; self.speedY = 0; self.health = 5; self.score = 100; self.canShoot = false; self.shootTimer = 0; self.shootInterval = 120; // 2 seconds at 60fps self.update = function () { self.x += self.speedX; self.y += self.speedY; // Simple movement pattern if (self.movePattern === 'sine') { self.y += Math.sin(LK.ticks * 0.05) * 2; } else if (self.movePattern === 'zigzag') { if (LK.ticks % 60 === 0) { self.speedY = -self.speedY || (Math.random() > 0.5 ? 3 : -3); } } // Shooting logic if (self.canShoot) { self.shootTimer++; if (self.shootTimer >= self.shootInterval) { self.shootTimer = 0; self.shoot(); } } // Auto destroy when off screen if (self.x < -100) { self.destroy(); } }; self.shoot = function () { if (!game) { return; } var speed = 12; // Create bullets in four directions: up, down, left, right var directions = [{ speedX: 0, speedY: -speed }, // Up { speedX: 0, speedY: speed }, // Down { speedX: -speed, speedY: 0 }, // Left { speedX: speed, speedY: 0 } // Right ]; for (var i = 0; i < directions.length; i++) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; bullet.speed = directions[i].speedX; bullet.speedY = directions[i].speedY; bullet.isPlayerBullet = false; bullet.bulletGraphics.tint = 0xff0000; // Red enemy bullets // Custom update for four-directional movement bullet.update = function () { this.x += this.speed; this.y += this.speedY; // Off screen check if (this.x < -100 || this.y < -100 || this.y > 2832 || this.x > 2148) { this.destroy(); } }; game.addChild(bullet); game.enemyBullets.push(bullet); } LK.getSound('shoot').play(); }; self.takeDamage = function (damage) { self.health -= damage; // Flash red when taking damage LK.effects.flashObject(self, 0xff0000, 200); if (self.health <= 0) { // Explosion effect LK.getSound('explosion').play(); LK.effects.flashObject(self, 0xffffff, 300); // Add score game.increaseScore(self.score); // Potentially drop powerup (20% chance) if (Math.random() < 0.2) { game.spawnPowerup(self.x, self.y); } self.destroy(); } }; return self; }); var Boss = Enemy.expand(function () { var self = Enemy.call(this); // Replace graphics with boss graphic self.enemyGraphics.destroy(); self.enemyGraphics = self.attachAsset('boss', { anchorX: 0.5, anchorY: 0.5 }); self.health = 75; self.score = 2000; self.speedX = -2; self.canShoot = true; self.shootInterval = 60; // 1 second at 60fps self.phase = 1; self.phaseTimer = 0; self.isBoss = true; // Override update function self.update = function () { self.phaseTimer++; // Boss movement based on phases if (self.phase === 1) { // Enter the screen if (self.x > 1600) { self.x += self.speedX; } else { self.phase = 2; self.phaseTimer = 0; } } else if (self.phase === 2) { // Move up and down self.y += Math.sin(self.phaseTimer * 0.03) * 4; // Shooting pattern if (self.phaseTimer % 20 === 0) { self.shoot(); } // Phase transition if (self.phaseTimer > 300) { self.phase = 3; self.phaseTimer = 0; } } else if (self.phase === 3) { // Charge at player if (self.phaseTimer < 60) { // Prepare self.speedX = 0; } else if (self.phaseTimer < 120) { // Charge self.x -= 15; } else { // Return to position if (self.x < 1600) { self.x += 5; } else { self.phase = 2; self.phaseTimer = 0; } } } // Health-based phase changes if (self.health < 25 && self.shootInterval > 40) { self.shootInterval = 40; // Shoot faster when at low health } }; // Override shoot function for more complex patterns self.shoot = function () { if (!game) { return; } var speed = 15; // Create bullets in four directions: up, down, left, right var directions = [{ speedX: 0, speedY: -speed }, // Up { speedX: 0, speedY: speed }, // Down { speedX: -speed, speedY: 0 }, // Left { speedX: speed, speedY: 0 } // Right ]; for (var i = 0; i < directions.length; i++) { var bullet = new Bullet(); bullet.x = self.x - 50; bullet.y = self.y; bullet.speed = directions[i].speedX; bullet.speedY = directions[i].speedY; bullet.isPlayerBullet = false; bullet.bulletGraphics.tint = 0xff0000; // Custom update for four-directional movement bullet.update = function () { this.x += this.speed; this.y += this.speedY; // Off screen check if (this.x < -100 || this.y < -100 || this.y > 2832 || this.x > 2148) { this.destroy(); } }; game.addChild(bullet); game.enemyBullets.push(bullet); } LK.getSound('shoot').play(); }; return self; }); var Obstacle = Container.expand(function () { var self = Container.call(this); self.obstacleGraphics = self.attachAsset('obstacle', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -8; self.update = function () { self.x += self.speed; // Auto destroy when off screen if (self.x < -100) { self.destroy(); } }; return self; }); var Player = Container.expand(function () { var self = Container.call(this); self.playerGraphics = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); self.health = 5; self.maxHealth = 5; self.shield = 0; self.weaponLevel = 1; self.specialMeter = 0; self.specialMax = 100; self.shootCooldown = 0; self.invulnerable = 0; self.update = function () { // Shooting cooldown if (self.shootCooldown > 0) { self.shootCooldown--; } // Invulnerability frames if (self.invulnerable > 0) { self.invulnerable--; // Flash effect during invulnerability if (LK.ticks % 5 === 0) { self.playerGraphics.alpha = self.playerGraphics.alpha === 1 ? 0.5 : 1; } } else { self.playerGraphics.alpha = 1; } // Gentle hover effect self.y += Math.sin(LK.ticks * 0.05) * 0.5; }; self.shoot = function () { if (self.shootCooldown > 0) { return; } LK.getSound('shoot').play(); var speed = 20; // Create bullets in four directions: up, down, left, right var directions = [{ speedX: speed, speedY: 0 }, // Right { speedX: 0, speedY: -speed }, // Up { speedX: 0, speedY: speed }, // Down { speedX: -speed, speedY: 0 } // Left ]; for (var i = 0; i < directions.length; i++) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; bullet.speed = directions[i].speedX; bullet.speedY = directions[i].speedY; bullet.isPlayerBullet = true; // Custom update for four-directional movement bullet.update = function () { this.x += this.speed; this.y += this.speedY; // Off screen check if (this.x < -100 || this.y < -100 || this.y > 2832 || this.x > 2148) { this.destroy(); } }; game.addChild(bullet); game.playerBullets.push(bullet); } self.shootCooldown = 10; // Increase special meter slightly with each shot self.specialMeter = Math.min(self.specialMeter + 1, self.specialMax); game.updateSpecialMeter(); }; self.activateSpecial = function () { if (self.specialMeter < self.specialMax) { return; } LK.getSound('special').play(); // Create special attack var special = new SpecialAttack(); special.x = self.x; special.y = self.y; game.addChild(special); game.specialAttacks.push(special); // Make player briefly invulnerable self.invulnerable = 60; // Reset special meter self.specialMeter = 0; game.updateSpecialMeter(); }; self.takeDamage = function () { if (self.invulnerable > 0) { return; } // Shield absorbs damage first if (self.shield > 0) { self.shield--; LK.getSound('damage').play(); LK.effects.flashObject(self, 0x3498db, 300); // Blue flash for shield hit } else { self.health--; LK.getSound('damage').play(); LK.effects.flashObject(self, 0xff0000, 300); // Red flash for health hit // Set invulnerability frames self.invulnerable = 60; // Game over check if (self.health <= 0) { // Store score storage.lastScore = game.score; if (game.score > storage.highScore) { storage.highScore = game.score; } LK.showGameOver(); } } game.updateHealthDisplay(); }; self.collectPowerup = function (powerup) { LK.getSound('powerup').play(); if (powerup.type === 'health') { self.health = Math.min(self.health + 1, self.maxHealth); } else if (powerup.type === 'shield') { self.shield = Math.min(self.shield + 2, 3); // Max 3 shield points } else if (powerup.type === 'weapon') { self.weaponLevel = Math.min(self.weaponLevel + 1, 3); } else if (powerup.type === 'special') { self.specialMeter = self.specialMax; // Fill special meter } game.updateHealthDisplay(); game.updateSpecialMeter(); // Visual effect LK.effects.flashObject(self, 0xffffff, 300); }; // Touch/mouse controls self.down = function (x, y, obj) { game.isDragging = true; }; return self; }); var PowerUp = Container.expand(function () { var self = Container.call(this); self.powerupGraphics = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -3; self.type = 'health'; // Default power-up type // Set color based on type if (self.type === 'health') { self.powerupGraphics.tint = 0x2ecc71; // Green } else if (self.type === 'shield') { self.powerupGraphics.tint = 0x3498db; // Blue } else if (self.type === 'weapon') { self.powerupGraphics.tint = 0xf1c40f; // Yellow } else if (self.type === 'special') { self.powerupGraphics.tint = 0x9b59b6; // Purple } self.update = function () { self.x += self.speed; // Gentle floating effect self.y += Math.sin(LK.ticks * 0.1) * 0.5; // Auto destroy when off screen if (self.x < -100) { self.destroy(); } }; return self; }); var SpecialAttack = Container.expand(function () { var self = Container.call(this); self.attackGraphics = self.attachAsset('specialAttack', { anchorX: 0.5, anchorY: 0.5, alpha: 0.7 }); self.duration = 60; // 1 second at 60fps self.counter = 0; self.damage = 5; self.update = function () { self.counter++; self.x += 10; // Flash effect if (self.counter % 5 === 0) { self.attackGraphics.alpha = self.attackGraphics.alpha === 0.7 ? 0.9 : 0.7; } // Auto destroy when duration ends if (self.counter >= self.duration) { self.destroy(); } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x0e0e2a }); /**** * Game Code ****/ // Game variables game.score = 0; game.level = 1; game.waveTimer = 0; game.bossActive = false; game.spawnRate = 120; // Enemy spawn rate (frames) game.isDragging = false; game.autoShoot = true; game.autoShootTimer = 0; // Array containers for game objects game.playerBullets = []; game.enemyBullets = []; game.enemies = []; game.alienShips = []; game.powerups = []; game.obstacles = []; game.specialAttacks = []; // Create background var background = game.addChild(LK.getAsset('background', { anchorX: 0.5, anchorY: 0.5, x: 1024, y: 1366 })); // Create player game.player = new Player(); game.player.x = 300; game.player.y = 1366; // Center vertically game.addChild(game.player); // Create UI // Score display var scoreTxt = new Text2('SCORE: 0', { size: 80, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Create touch screen buttons for movement var leftBtn = game.addChild(LK.getAsset('powerup', { anchorX: 0.5, anchorY: 0.5, x: 100, y: 2500, scaleX: 2, scaleY: 2, tint: 0x3498db })); var rightBtn = game.addChild(LK.getAsset('powerup', { anchorX: 0.5, anchorY: 0.5, x: 400, y: 2500, scaleX: 2, scaleY: 2, tint: 0x3498db })); var upBtn = game.addChild(LK.getAsset('powerup', { anchorX: 0.5, anchorY: 0.5, x: 250, y: 2400, scaleX: 2, scaleY: 2, tint: 0x3498db })); var downBtn = game.addChild(LK.getAsset('powerup', { anchorX: 0.5, anchorY: 0.5, x: 250, y: 2600, scaleX: 2, scaleY: 2, tint: 0x3498db })); // Button event handlers leftBtn.down = function () { game.player.x = Math.max(85, game.player.x - 10); }; rightBtn.down = function () { game.player.x = Math.min(1963, game.player.x + 10); }; upBtn.down = function () { game.player.y = Math.max(85, game.player.y - 10); }; downBtn.down = function () { game.player.y = Math.min(2647, game.player.y + 10); }; // Health display var healthTxt = new Text2('HEALTH: 5', { size: 60, fill: 0x2ECC71 }); healthTxt.anchor.set(0, 0); healthTxt.x = 120; healthTxt.y = 100; LK.gui.addChild(healthTxt); // Shield display var shieldTxt = new Text2('SHIELD: 0', { size: 60, fill: 0x3498DB }); shieldTxt.anchor.set(0, 0); shieldTxt.x = 120; shieldTxt.y = 170; LK.gui.addChild(shieldTxt); // Special meter var specialTxt = new Text2('SPECIAL: 0%', { size: 60, fill: 0x9B59B6 }); specialTxt.anchor.set(0, 0); specialTxt.x = 120; specialTxt.y = 240; LK.gui.addChild(specialTxt); // Level display var levelTxt = new Text2('LEVEL 1', { size: 60, fill: 0xF1C40F }); levelTxt.anchor.set(1, 0); levelTxt.x = -120; levelTxt.y = 100; LK.gui.right.addChild(levelTxt); // Special attack button var specialBtn = game.addChild(LK.getAsset('powerup', { anchorX: 0.5, anchorY: 0.5, x: 1900, y: 2500, scaleX: 2, scaleY: 2, tint: 0x9b59b6 })); // Update UI functions game.updateScoreDisplay = function () { scoreTxt.setText('SCORE: ' + game.score); }; game.updateHealthDisplay = function () { healthTxt.setText('HEALTH: ' + game.player.health); shieldTxt.setText('SHIELD: ' + game.player.shield); }; game.updateSpecialMeter = function () { var percentage = Math.floor(game.player.specialMeter / game.player.specialMax * 100); specialTxt.setText('SPECIAL: ' + percentage + '%'); // Visual indication of special readiness if (percentage >= 100) { specialTxt.setStyle({ fill: 0xFFFFFF }); tween(specialTxt, { alpha: 0.5 }, { duration: 500, easing: tween.easeInOut, onFinish: function onFinish() { tween(specialTxt, { alpha: 1 }, { duration: 500, easing: tween.easeInOut }); } }); } else { specialTxt.setStyle({ fill: 0x9B59B6 }); specialTxt.alpha = 1; } }; game.updateLevelDisplay = function () { levelTxt.setText('LEVEL ' + game.level); }; // Spawn functions game.spawnEnemy = function (type) { var enemy = new Enemy(); enemy.x = 2148; // Just off-screen to the right enemy.y = 500 + Math.random() * 1400; // Random y position // Configure enemy type if (type === 'basic') { enemy.movePattern = 'none'; enemy.canShoot = true; // Enable shooting for basic enemies } else if (type === 'shooter') { enemy.movePattern = 'none'; enemy.canShoot = true; enemy.enemyGraphics.tint = 0xe67e22; // Orange } else if (type === 'fast') { enemy.movePattern = 'zigzag'; enemy.speedX = -10; enemy.health = 2; enemy.canShoot = true; // Enable shooting for fast enemies enemy.enemyGraphics.tint = 0xe74c3c; // Red } else if (type === 'tank') { enemy.movePattern = 'sine'; enemy.speedX = -3; enemy.health = 12; enemy.score = 250; enemy.canShoot = true; // Enable shooting for tank enemies enemy.enemyGraphics.scaleX = 1.5; enemy.enemyGraphics.scaleY = 1.5; enemy.enemyGraphics.tint = 0x7f8c8d; // Gray } game.addChild(enemy); game.enemies.push(enemy); return enemy; }; game.spawnBoss = function () { // Only one boss at a time if (game.bossActive) { return; } game.bossActive = true; var boss = new Boss(); boss.x = 2300; // Start off-screen boss.y = 1366; // Center vertically game.addChild(boss); game.enemies.push(boss); return boss; }; game.spawnObstacle = function () { var obstacle = new Obstacle(); obstacle.x = 2148; // Just off-screen to the right obstacle.y = 400 + Math.random() * 1600; // Random y position game.addChild(obstacle); game.obstacles.push(obstacle); return obstacle; }; game.spawnAlienShip = function () { var alienShip = new AlienShip(); alienShip.x = 2148; // Just off-screen to the right alienShip.y = 300 + Math.random() * 1800; // Random y position alienShip.lastY = alienShip.y; alienShip.lastPlayerIntersecting = false; game.addChild(alienShip); game.alienShips.push(alienShip); return alienShip; }; game.spawnPowerup = function (x, y) { var powerup = new PowerUp(); powerup.x = x; powerup.y = y; // Random powerup type var types = ['health', 'shield', 'weapon', 'special']; var weights = [0.3, 0.3, 0.2, 0.2]; // Higher chance for health/shield var total = 0; var random = Math.random(); for (var i = 0; i < types.length; i++) { total += weights[i]; if (random <= total) { powerup.type = types[i]; break; } } // Set color based on type if (powerup.type === 'health') { powerup.powerupGraphics.tint = 0x2ecc71; // Green } else if (powerup.type === 'shield') { powerup.powerupGraphics.tint = 0x3498db; // Blue } else if (powerup.type === 'weapon') { powerup.powerupGraphics.tint = 0xf1c40f; // Yellow } else if (powerup.type === 'special') { powerup.powerupGraphics.tint = 0x9b59b6; // Purple } game.addChild(powerup); game.powerups.push(powerup); return powerup; }; // Score function game.increaseScore = function (amount) { game.score += amount; game.updateScoreDisplay(); // Level up every 5000 points if (game.score > 0 && game.score % 5000 === 0) { game.levelUp(); } }; game.levelUp = function () { game.level++; game.updateLevelDisplay(); // Spawn boss every 3 levels if (game.level % 3 === 0) { game.spawnBoss(); } // Increase difficulty game.spawnRate = Math.max(60, game.spawnRate - 10); // Flash screen LK.effects.flashScreen(0xf1c40f, 500); // Yellow flash }; // Event handlers game.down = function (x, y, obj) { // Special button handling if (obj === specialBtn && game.player.specialMeter >= game.player.specialMax) { game.player.activateSpecial(); return; } // Player shooting game.player.shoot(); // Start dragging game.isDragging = true; }; game.up = function (x, y, obj) { game.isDragging = false; }; game.move = function (x, y, obj) { if (game.isDragging) { // Calculate movement based on touchpad input var deltaX = x - game.player.x; var deltaY = y - game.player.y; // Apply movement with a sensitivity factor game.player.x += deltaX * 0.1; game.player.y += deltaY * 0.1; // Ensure player stays within screen bounds game.player.x = Math.max(85, Math.min(game.player.x, 1963)); game.player.y = Math.max(85, Math.min(game.player.y, 2647)); } }; // Main game update loop game.update = function () { // Auto-shooting if (game.autoShoot) { game.autoShootTimer++; if (game.autoShootTimer >= 15) { // Every 15 frames (4 times per second) game.player.shoot(); game.autoShootTimer = 0; } } // Spawn enemies based on timer game.waveTimer++; if (!game.bossActive && game.waveTimer >= game.spawnRate) { game.waveTimer = 0; // Different enemy types based on level var types = ['basic']; if (game.level >= 2) { types.push('shooter'); } if (game.level >= 3) { types.push('fast'); } if (game.level >= 5) { types.push('tank'); } // Spawn random enemy type var type = types[Math.floor(Math.random() * types.length)]; game.spawnEnemy(type); // Spawn alien ships (15% chance after level 4) if (game.level >= 4 && Math.random() < 0.15) { game.spawnAlienShip(); } // Occasionally spawn obstacles (10% chance) if (Math.random() < 0.1) { game.spawnObstacle(); } } // Check boss status if (game.bossActive) { var bossStillActive = false; for (var i = 0; i < game.enemies.length; i++) { if (game.enemies[i].isBoss) { bossStillActive = true; break; } } game.bossActive = bossStillActive; } // Check collisions // Player bullets vs enemies for (var i = game.playerBullets.length - 1; i >= 0; i--) { var bullet = game.playerBullets[i]; // Skip destroyed bullets if (!bullet.parent) { game.playerBullets.splice(i, 1); continue; } for (var j = game.enemies.length - 1; j >= 0; j--) { var enemy = game.enemies[j]; // Skip destroyed enemies if (!enemy.parent) { game.enemies.splice(j, 1); continue; } if (bullet.intersects(enemy)) { enemy.takeDamage(bullet.damage); bullet.destroy(); game.playerBullets.splice(i, 1); break; } } // Check alien ships for (var j = game.alienShips.length - 1; j >= 0; j--) { var alienShip = game.alienShips[j]; // Skip destroyed alien ships if (!alienShip.parent) { game.alienShips.splice(j, 1); continue; } if (bullet.intersects(alienShip)) { alienShip.takeDamage(bullet.damage); bullet.destroy(); game.playerBullets.splice(i, 1); break; } } } // Special attacks vs enemies for (var i = game.specialAttacks.length - 1; i >= 0; i--) { var special = game.specialAttacks[i]; // Skip destroyed specials if (!special.parent) { game.specialAttacks.splice(i, 1); continue; } for (var j = game.enemies.length - 1; j >= 0; j--) { var enemy = game.enemies[j]; // Skip destroyed enemies if (!enemy.parent) { game.enemies.splice(j, 1); continue; } if (special.intersects(enemy)) { enemy.takeDamage(special.damage); } } // Special vs alien ships for (var j = game.alienShips.length - 1; j >= 0; j--) { var alienShip = game.alienShips[j]; // Skip destroyed alien ships if (!alienShip.parent) { game.alienShips.splice(j, 1); continue; } if (special.intersects(alienShip)) { alienShip.takeDamage(special.damage); } } // Special clears enemy bullets too for (var j = game.enemyBullets.length - 1; j >= 0; j--) { var bullet = game.enemyBullets[j]; // Skip destroyed bullets if (!bullet.parent) { game.enemyBullets.splice(j, 1); continue; } if (special.intersects(bullet)) { bullet.destroy(); game.enemyBullets.splice(j, 1); } } } // Enemy bullets vs player for (var i = game.enemyBullets.length - 1; i >= 0; i--) { var bullet = game.enemyBullets[i]; // Skip destroyed bullets if (!bullet.parent) { game.enemyBullets.splice(i, 1); continue; } if (bullet.intersects(game.player)) { game.player.takeDamage(); bullet.destroy(); game.enemyBullets.splice(i, 1); } } // Obstacles vs player for (var i = game.obstacles.length - 1; i >= 0; i--) { var obstacle = game.obstacles[i]; // Skip destroyed obstacles if (!obstacle.parent) { game.obstacles.splice(i, 1); continue; } if (obstacle.intersects(game.player)) { game.player.takeDamage(); obstacle.destroy(); game.obstacles.splice(i, 1); } } // Powerups vs player for (var i = game.powerups.length - 1; i >= 0; i--) { var powerup = game.powerups[i]; // Skip destroyed powerups if (!powerup.parent) { game.powerups.splice(i, 1); continue; } if (powerup.intersects(game.player)) { game.player.collectPowerup(powerup); powerup.destroy(); game.powerups.splice(i, 1); } } // Remove destroyed enemies from array for (var i = game.enemies.length - 1; i >= 0; i--) { if (!game.enemies[i].parent) { game.enemies.splice(i, 1); } } // Update arrays of objects that might be removed game.playerBullets = game.playerBullets.filter(function (bullet) { return bullet.parent !== null; }); game.enemyBullets = game.enemyBullets.filter(function (bullet) { return bullet.parent !== null; }); game.obstacles = game.obstacles.filter(function (obstacle) { return obstacle.parent !== null; }); game.powerups = game.powerups.filter(function (powerup) { return powerup.parent !== null; }); game.specialAttacks = game.specialAttacks.filter(function (special) { return special.parent !== null; }); game.alienShips = game.alienShips.filter(function (alienShip) { return alienShip.parent !== null; }); // Static background - no scrolling }; // Initialize displays game.updateScoreDisplay(); game.updateHealthDisplay(); game.updateSpecialMeter(); game.updateLevelDisplay(); // Start background music LK.playMusic('bgm');