var StarField = Container.expand(function () { var self = Container.call(this); self.stars = []; var numberOfStars = 300; for (var i = 0; i < numberOfStars; i++) { var star = LK.getAsset('star', 'Star'); star.anchor.set(0.5, 0.5); star.x = Math.random() * 2048; star.y = Math.random() * 2732; star.speed = Math.random() * 2 + 0.5; star.alpha = Math.random() * 0.5 + 0.5; self.addChild(star); self.stars.push(star); } self.update = function () { for (var i = 0; i < self.stars.length; i++) { var star = self.stars[i]; star.y += star.speed; if (star.y > 2732) { star.y -= 2732; } } }; }); var Hero = Container.expand(function () { var self = Container.call(this); self.doubleCannon = false; self.doubleCannonPowerUpCount = 0; var heroGraphics = LK.getAsset('hero', 'Hero Space Ship'); heroGraphics.anchor.set(0.5, 0.5); self.healthBar = new HealthBar(100); self.healthBar.y = -heroGraphics.height / 2 - self.healthBar.height - 5; self.healthBar.x = -self.healthBar.width / 2; self.addChild(self.healthBar); self.addChild(heroGraphics); self.moveTowards = function (target, speed) { var dx = target.x - self.x; var dy = target.y - self.y; var distance = Math.sqrt(dx * dx + dy * dy); if (distance > speed) { self.x += dx * speed / distance; self.y += dy * speed / distance; } else { self.x = target.x; self.y = target.y; } }; self.fireBullet = function () { if (self.doubleCannon) { var bullet1 = new Bullet(); bullet1.x = self.x - heroGraphics.width / 4; bullet1.y = self.y - heroGraphics.height / 2; var bullet2 = new Bullet(); bullet2.x = self.x + heroGraphics.width / 4; bullet2.y = self.y - heroGraphics.height / 2; return [bullet1, bullet2]; } else { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y - heroGraphics.height / 2; return [bullet]; } }; }); var Enemy = Container.expand(function (isBoss, enemyType) { var self = Container.call(this); isBoss = isBoss || false; enemyType = enemyType || 'enemy1'; var enemyGraphics; if (isBoss) { enemyGraphics = LK.getAsset('boss', 'Boss Space Ship'); } else { switch (enemyType) { case 'enemy1': enemyGraphics = LK.getAsset('enemy1', 'Enemy Space Ship 1'); break; case 'enemy2': enemyGraphics = LK.getAsset('enemy2', 'Enemy Space Ship 2'); break; case 'enemy3': enemyGraphics = LK.getAsset('enemy3', 'Enemy Space Ship 3'); break; case 'enemy4': enemyGraphics = LK.getAsset('enemy4', 'Enemy Space Ship 4'); break; case 'enemy5': enemyGraphics = LK.getAsset('enemy5', 'Enemy Space Ship 5'); break; default: enemyGraphics = LK.getAsset('enemy1', 'Enemy Space Ship 1'); } } enemyGraphics.anchor.set(0.5, 0.5); self.healthBar = new HealthBar(isBoss ? 500 : 50); self.healthBar.y = -enemyGraphics.height / 2 - self.healthBar.height - 5; self.healthBar.x = -self.healthBar.width / 2; self.addChild(self.healthBar); self.addChild(enemyGraphics); self.state = "flyingIntoScreen"; self.flyInY = isBoss ? 2732 / 4 : Math.random() * (2732 / 2 - 100) + 50; self.angle = 0; self.shootCounter = Math.random() * 100; self.shoot = function (heroX, heroY, container) { var dx = heroX - self.x; var dy = heroY - self.y; var distance = Math.sqrt(dx * dx + dy * dy); var speedMultiplier = 1 + container.score * 0.001; var vx = 7 * speedMultiplier * dx / distance; var vy = 7 * speedMultiplier * dy / distance; var enemyBullet = isBoss ? new BossBullet(vx, vy) : new EnemyBullet(vx, vy); enemyBullet.x = self.x; enemyBullet.y = self.y + enemyGraphics.height / 2; return enemyBullet; }; self.move = function (speed) { if (self.state === "flyingIntoScreen") { self.y += speed; if (self.y >= self.flyInY) { self.state = "circularPattern"; } } else if (self.state === "circularPattern") { self.angle += 0.025; self.x += Math.cos(self.angle) * speed; self.y += Math.sin(2 * self.angle) * speed * 0.5; } }; }); var BossBullet = Container.expand(function (vx, vy) { var self = Container.call(this); var bulletGraphics = LK.getAsset('bossBullet', 'Boss Bullet'); bulletGraphics.anchor.set(0.5, 0.5); self.addChild(bulletGraphics); self.vx = vx; self.vy = vy; self.move = function () { self.x += self.vx; self.y += self.vy; }; }); var EnemyBullet = Container.expand(function (vx, vy) { var self = Container.call(this); var bulletGraphics = LK.getAsset('enemyBullet', 'Enemy Bullet'); bulletGraphics.anchor.set(0.5, 0.5); self.addChild(bulletGraphics); self.vx = vx; self.vy = vy; self.move = function () { self.x += self.vx; self.y += self.vy; }; }); var Bullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = LK.getAsset('bullet', 'Bullet'); bulletGraphics.anchor.set(0.5, 0.5); self.addChild(bulletGraphics); }); var HealthBar = Container.expand(function (maxHealth) { var self = Container.call(this); self.maxHealth = maxHealth; self.currentHealth = maxHealth; self.isDead = function () { return self.currentHealth <= 0; }; self.bar = LK.getAsset('healthBar', 'Health Bar', 0, 0); self.bar.width = maxHealth === 500 ? 400 : 100; self.bar.height = maxHealth === 500 ? 20 : 10; self.addChild(self.bar); self.updateHealth = function (health) { self.currentHealth = health; self.bar.scale.x = self.currentHealth / self.maxHealth; }; }); var PowerUp = Container.expand(function (type) { var self = Container.call(this); self.type = type; var powerUpGraphics = self.type === 'doubleCannon' ? LK.getAsset('doubleCannonPowerUp', 'Double Cannon Power Up') : LK.getAsset('powerUp', 'Power Up'); powerUpGraphics.anchor.set(0.5, 0.5); self.addChild(powerUpGraphics); self.speed = 3; self.move = function () { self.y += self.speed; }; }); var Game = Container.expand(function () { var self = Container.call(this); var scoreText = new Text2('0', { size: 150, font: "'GillSans-Bold',Impact,'Arial Black',Tahoma", fill: "#ffffff" }); scoreText.anchor.set(.5, 0); LK.gui.top.addChild(scoreText); self.powerUpIcons = new Container(); self.powerUpIcons.x = 2048 - 100; self.powerUpIcons.y = 2732 - 100; self.addChild(self.powerUpIcons); var starField = stage.addChild(new StarField()); self.score = 0; var hero = self.addChild(new Hero()); hero.x = 1024; hero.y = 2420; var enemies = []; var bullets = []; var enemyBullets = []; var spawnEnemy = function (x, y, isBoss, enemyType) { var enemy = new Enemy(isBoss, enemyType); enemy.x = x; enemy.y = y; self.addChild(enemy); enemies.push(enemy); }; var fireBullet = function () { var bullet = hero.fireBullet(); self.addChild(bullet); bullets.push(bullet); }; var currentWave = 1; var spawnWave = function () { var enemyType = 'enemy' + ((currentWave - 1) % 5 + 1); for (var i = 0; i < 5 + Math.floor(currentWave / 2); i++) { var x = Math.random() * (2048 - 100) + 50; spawnEnemy(x, -100, false, enemyType); } }; var spawnPowerUp = function () { var x = Math.random() * (2048 - 100) + 50; var powerUp = new PowerUp(Math.random() < 0.5 ? 'doubleCannon' : 'default'); powerUp.x = x; powerUp.y = -100; self.addChild(powerUp); powerUps.push(powerUp); }; var powerUps = []; var checkPowerUpCollision = function () { for (var i = 0; i < powerUps.length; i++) { var powerUp = powerUps[i]; if (hero.intersects(powerUp)) { self.removeChild(powerUp); powerUps.splice(i, 1); if (powerUp.type === 'doubleCannon') { hero.doubleCannon = true; hero.doubleCannonPowerUpCount++; var powerUpIcon = LK.getAsset('doubleCannonPowerUp', 'Double Cannon Power Up'); powerUpIcon.anchor.set(0.5, 0.5); powerUpIcon.x = -85 * self.powerUpIcons.children.length; self.powerUpIcons.addChild(powerUpIcon); LK.setTimeout(function () { hero.doubleCannonPowerUpCount--; if (hero.doubleCannonPowerUpCount === 0) { hero.doubleCannon = false; } self.powerUpIcons.removeChild(powerUpIcon); self.powerUpIcons.children.forEach(function (icon, index) { icon.x = -50 * index; }); }, 15000); } else { heroSpeed *= 2; var powerUpIcon = LK.getAsset('powerUp', 'Power Up'); powerUpIcon.anchor.set(0.5, 0.5); powerUpIcon.x = -50 * self.powerUpIcons.children.length; self.powerUpIcons.addChild(powerUpIcon); LK.setTimeout(function () { heroSpeed /= 2; self.powerUpIcons.removeChild(powerUpIcon); self.powerUpIcons.children.forEach(function (icon, index) { icon.x = -50 * index; }); }, 15000); } } } }; spawnWave(); currentWave++; var spawnBoss = function () { var x = 1024; var y = -100; spawnEnemy(x, y, true, 'boss'); }; var autoFire = LK.setInterval(function () { var bulletsFired = hero.fireBullet(); bulletsFired.forEach(function (bullet) { self.addChild(bullet); bullets.push(bullet); }); }, 600); var targetPosition = { x: hero.x, y: hero.y }; stage.on('move', function (obj) { var event = obj.event; var pos = event.getLocalPosition(self); targetPosition.x = pos.x; targetPosition.y = pos.y; }); var heroSpeed = 15; function resetGame() { bullets.forEach(function (bullet) { self.removeChild(bullet); }); enemyBullets.forEach(function (bullet) { self.removeChild(bullet); }); enemies.forEach(function (enemy) { self.removeChild(enemy); }); bullets = []; enemyBullets = []; enemies = []; hero.x = 1024; hero.y = 2420; hero.healthBar.updateHealth(hero.healthBar.maxHealth); self.score = 0; currentWave = 1; spawnWave(); } LK.on('tick', function () { hero.moveTowards(targetPosition, heroSpeed); hero.x = Math.min(Math.max(hero.x, 0), 2048); hero.y = Math.min(Math.max(hero.y, 0), 2732); }); LK.on('tick', function () { starField.update(); for (var i = 0; i < powerUps.length; i++) { powerUps[i].move(); if (powerUps[i].y > 2732 || powerUps[i].x < 0 || powerUps[i].x > 2048) { self.removeChild(powerUps[i]); powerUps.splice(i, 1); i--; } } checkPowerUpCollision(); if (Math.random() < 0.001) { spawnPowerUp(); } for (var i = 0; i < enemies.length; i++) { enemies[i].move(5 + self.score * 0.001); } for (var i = 0; i < enemies.length; i++) { enemies[i].move(5); enemies[i].shootCounter--; if (enemies[i].shootCounter <= 0) { var enemyBullet = enemies[i].shoot(hero.x, hero.y, self); self.addChild(enemyBullet); enemyBullets.push(enemyBullet); enemies[i].shootCounter = (enemies[i].isBoss ? 50 : 100) + Math.random() * 100; } } for (var j = 0; j < enemyBullets.length; j++) { enemyBullets[j].move(); if (enemyBullets[j].x >= hero.x - hero.width / 2 && enemyBullets[j].x <= hero.x + hero.width / 2 && enemyBullets[j].y >= hero.y - hero.height / 2 && enemyBullets[j].y <= hero.y + hero.height / 2) { hero.healthBar.updateHealth(hero.healthBar.currentHealth - 10); self.removeChild(enemyBullets[j]); enemyBullets.splice(j, 1); if (hero.healthBar.isDead()) { resetGame(); return; } } if (enemyBullets[j] && enemyBullets[j].y > 2732 + 30) { self.removeChild(enemyBullets[j]); enemyBullets.splice(j, 1); j--; } } function checkBulletCollision(bulletsArray, targetArray, onHitCallback) { for (var j = 0; j < bulletsArray.length; j++) { bulletsArray[j].y -= 10; if (bulletsArray[j].y < -30 || bulletsArray[j].y > 2732 || bulletsArray[j].x < 0 || bulletsArray[j].x > 2048) { self.removeChild(bulletsArray[j]); bulletsArray.splice(j, 1); j--; } else { for (var k = targetArray.length - 1; k >= 0; k--) { var target = targetArray[k]; if (target.intersects(bulletsArray[j])) { self.removeChild(bulletsArray[j]); bulletsArray.splice(j, 1); j--; onHitCallback(target, k); break; } } } } } checkBulletCollision(bullets, enemies, function (enemy, index) { enemy.healthBar.updateHealth(enemy.healthBar.currentHealth - 10); if (enemy.healthBar.isDead()) { self.removeChild(enemy); enemies.splice(index, 1); self.score += 10 * currentWave; if (enemies.length === 0) { if (currentWave % 5 === 0) { spawnBoss(); } else { spawnWave(); } currentWave++; } scoreText.setText(self.score); } }); }); });

Galactic Invader (Legacy) by Benjaminsen

Remixes

Images