/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Boss enemy class var Boss = Container.expand(function (difficulty) { var self = Container.call(this); var bossSprite = self.attachAsset('mutant', { anchorX: 0.5, anchorY: 0.5 }); // Make boss visually distinct: scale up, tint, etc. bossSprite.scaleX = 3.2; bossSprite.scaleY = 3.2; bossSprite.tint = 0x8e24aa; // purple self.radius = bossSprite.width * 1.6; // Difficulty scaling var diff = typeof difficulty === "number" ? difficulty : 1; self.speed = 0.4 + diff * 0.05; // Easier: boss is slower, less scaling self.shootTimer = 36 + Math.floor(Math.random() * 30); self.hp = 32 + diff * 5; // Easier: boss HP scales less // Called every tick self.update = function () { self.y += self.speed; self.shootTimer--; if (self.shootTimer <= 0) { // If boss HP is below half, alternate between spread and ring attacks if (self.hp <= (32 + diff * 8) / 2 && Math.random() < 0.5) { self.shootRing(diff); } else { self.shoot(diff); } // Boss shoots more often as difficulty increases var minShoot = Math.max(24, 60 - diff * 4); var maxShoot = Math.max(36, 100 - diff * 6); self.shootTimer = minShoot + Math.floor(Math.random() * (maxShoot - minShoot)); } }; // Boss fires a spread of bullets downward (classic spread attack) self.shoot = function (diff) { var numBullets = 9 + Math.floor(diff / 2); // More bullets at higher difficulty var spread = Math.PI * (0.7 + diff * 0.08); // wider spread as difficulty increases var baseAngle = Math.PI / 2; // Downwards for (var i = 0; i < numBullets; i++) { var angle = baseAngle - spread / 2 + spread / (numBullets - 1) * i; var bullet = new MutantBullet(); bullet.x = self.x; bullet.y = self.y + self.radius; bullet.speedX = Math.cos(angle) * (15 + diff * 0.7); bullet.speed = Math.sin(angle) * (15 + diff * 0.7); mutantBullets.push(bullet); game.addChild(bullet); } LK.getSound('mutantShoot').play(); }; // Boss fires a ring of bullets in all directions (harder pattern) self.shootRing = function (diff) { var numBullets = 16 + Math.floor(diff * 1.5); // More bullets in ring as difficulty increases var baseAngle = Math.random() * Math.PI * 2; // randomize ring rotation for (var i = 0; i < numBullets; i++) { var angle = baseAngle + Math.PI * 2 / numBullets * i; var bullet = new MutantBullet(); bullet.x = self.x; bullet.y = self.y + self.radius * 0.7; bullet.speedX = Math.cos(angle) * (10 + diff * 0.5); bullet.speed = Math.sin(angle) * (10 + diff * 0.5); mutantBullets.push(bullet); game.addChild(bullet); } LK.getSound('mutantShoot').play(); }; // Take damage self.hit = function () { self.hp--; LK.getSound('mutantHit').play(); LK.effects.flashObject(self, 0xffffff, 150); if (self.hp <= 0) { self.destroy(); // Allow further mutant spawning after boss dies bossSpawned = false; return true; } return false; }; return self; }); // Hero class var Hero = Container.expand(function () { var self = Container.call(this); var heroSprite = self.attachAsset('hero', { anchorX: 0.5, anchorY: 0.5 }); self.radius = heroSprite.width * 0.5; self.shootCooldown = 0; // ticks until next shot allowed // Called every tick self.update = function () { if (self.shootCooldown > 0) { self.shootCooldown--; } }; // Shoot a bullet upwards self.shoot = function () { if (self.shootCooldown === 0) { var bullet = new HeroBullet(); bullet.x = self.x; bullet.y = self.y - self.radius - bullet.height * 0.5; heroBullets.push(bullet); game.addChild(bullet); LK.getSound('heroShoot').play(); self.shootCooldown = 12; // 12 ticks cooldown (~0.2s) } }; return self; }); // Hero bullet class var HeroBullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('heroBullet', { anchorX: 0.5, anchorY: 0.5 }); self.width = bulletSprite.width; self.height = bulletSprite.height; self.speed = -22; self.update = function () { self.y += self.speed; }; return self; }); // Mutant enemy class var Mutant = Container.expand(function (difficulty) { var self = Container.call(this); var mutantSprite = self.attachAsset('mutant', { anchorX: 0.5, anchorY: 0.5 }); self.radius = mutantSprite.width * 0.5; // Difficulty scaling var diff = typeof difficulty === "number" ? difficulty : 1; // Mutants are always fast, but their attack pattern does not scale with difficulty self.speed = 5 + Math.random() * 2; // Fast mutants, fixed speed self.shootTimer = 60 + Math.floor(Math.random() * 60); // Randomize first shot self.hp = 2; // Fixed HP for easier gameplay // Called every tick self.update = function () { self.y += self.speed; self.shootTimer--; if (self.shootTimer <= 0) { self.shoot(diff); // Mutants shoot more often as difficulty increases var minShoot = Math.max(30, 90 - diff * 8); var maxShoot = Math.max(50, 150 - diff * 10); self.shootTimer = minShoot + Math.floor(Math.random() * (maxShoot - minShoot)); } }; // Shoot a bullet downwards, with difficulty-based spread self.shoot = function (diff) { var numBullets = 1; // Always 1 bullet, no scaling var spread = 0; // No spread var baseAngle = Math.PI / 2; // Downwards for (var i = 0; i < numBullets; i++) { var angle = baseAngle; var bullet = new MutantBullet(); bullet.x = self.x; bullet.y = self.y + self.radius + bullet.height * 0.5; bullet.speedX = 0; bullet.speed = 14; // Fixed bullet speed mutantBullets.push(bullet); game.addChild(bullet); } LK.getSound('mutantShoot').play(); }; // Take damage self.hit = function () { self.hp--; LK.getSound('mutantHit').play(); LK.effects.flashObject(self, 0xffffff, 150); if (self.hp <= 0) { self.destroy(); return true; } return false; }; return self; }); // Mutant bullet class var MutantBullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('mutantBullet', { anchorX: 0.5, anchorY: 0.5 }); self.width = bulletSprite.width; self.height = bulletSprite.height; self.speed = 14; self.update = function () { if (typeof self.speedX === "number") { self.x += self.speedX; } if (typeof self.speed === "number") { self.y += self.speed; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x181818 }); /**** * Game Code ****/ // Game variables // Hero: blue box // Mutant: green ellipse // Hero bullet: yellow box // Mutant bullet: red ellipse // Sound effects // Music var hero; var mutants = []; var heroBullets = []; var mutantBullets = []; var lastHeroX = 0, lastHeroY = 0; var score = 0; var scoreTxt; var wave = 1; var spawnTimer = 0; var gameOver = false; var bossSpawned = false; var difficultyLevel = 0; // Increases each time a boss or mutant wave is spawned // Score display scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Start music LK.playMusic('bgmusic'); // Create hero hero = new Hero(); hero.x = 2048 / 2; hero.y = 2732 - 350; game.addChild(hero); // Helper: spawn a wave of mutants function spawnMutantWave() { // Boss appears at score >= 100, only once per game if (typeof bossSpawned === "undefined") { bossSpawned = false; } if (score >= 100 && !bossSpawned) { difficultyLevel++; // Increase difficulty each time boss spawns var boss = new Boss(difficultyLevel); boss.x = 2048 / 2; boss.y = -220; mutants.push(boss); game.addChild(boss); bossSpawned = true; } else { difficultyLevel++; // Increase difficulty each time a new wave spawns var m = new Mutant(difficultyLevel); // Spawn mutant at a more varied X position (avoid edges) var minX = 120; var maxX = 2048 - 120; m.x = minX + Math.random() * (maxX - minX); // More variety in Y spawn m.y = -100 - Math.random() * 400; mutants.push(m); game.addChild(m); wave++; } } // Initial wave spawnMutantWave(); // Touch/mouse drag controls removed -- hero is now controlled by tap-to-move // Tap left/right half of screen to move hero horizontally by a fixed amount game.down = function (x, y, obj) { var minX = hero.radius + 20; var maxX = 2048 - hero.radius - 20; // Only move horizontally, keep Y fixed var moveAmount = 220; if (x < 2048 / 2) { // Tap left half: move left hero.x = Math.max(minX, hero.x - moveAmount); } else { // Tap right half: move right hero.x = Math.min(maxX, hero.x + moveAmount); } }; game.move = null; game.up = null; // Main game loop game.update = function () { if (gameOver) { return; } // Hero update hero.update(); // Show fire rate level above hero if (!hero.fireRateTxt) { hero.fireRateTxt = new Text2('', { size: 60, fill: "#fff" }); hero.fireRateTxt.anchor.set(0.5, 1); game.addChild(hero.fireRateTxt); } hero.fireRateTxt.x = hero.x; hero.fireRateTxt.y = hero.y - hero.radius - 30; var fireRateLevel = Math.floor(score / 50); if (fireRateLevel > 0) { hero.fireRateTxt.setText("Lv." + (fireRateLevel + 1)); hero.fireRateTxt.visible = true; } else { hero.fireRateTxt.visible = false; } // Hero auto-shoots, fire rate improves every 50 points (min cooldown 4 ticks) var minCooldown = 4; var baseCooldown = 10; var fireRateLevel = Math.floor(score / 50); var heroCooldown = Math.max(baseCooldown - fireRateLevel * 2, minCooldown); if (LK.ticks % heroCooldown === 0) { hero.shoot(); } // Mutant update for (var i = mutants.length - 1; i >= 0; i--) { var m = mutants[i]; m.update(); // Remove if off screen if (m.y > 2732 + 100) { m.destroy(); mutants.splice(i, 1); continue; } // Mutant collides with hero (game over) if (m.intersects(hero)) { LK.effects.flashScreen(0xff0000, 1000); LK.getSound('heroHit').play(); gameOver = true; LK.showGameOver(); return; } } // Hero bullets update for (var i = heroBullets.length - 1; i >= 0; i--) { var b = heroBullets[i]; b.update(); // Remove if off screen if (b.y < -100) { b.destroy(); heroBullets.splice(i, 1); continue; } // Check collision with mutants var hit = false; for (var j = mutants.length - 1; j >= 0; j--) { var m = mutants[j]; if (b.intersects(m)) { b.destroy(); heroBullets.splice(i, 1); if (m.hit()) { // Mutant destroyed mutants.splice(j, 1); score += 10; scoreTxt.setText(score); } else { score += 2; scoreTxt.setText(score); } hit = true; break; } } if (hit) { continue; } } // Mutant bullets update for (var i = mutantBullets.length - 1; i >= 0; i--) { var b = mutantBullets[i]; b.update(); // Remove if off screen if (b.y > 2732 + 100) { b.destroy(); mutantBullets.splice(i, 1); continue; } // Check collision with hero if (b.intersects(hero)) { LK.effects.flashScreen(0xff0000, 1000); LK.getSound('heroHit').play(); b.destroy(); mutantBullets.splice(i, 1); gameOver = true; LK.showGameOver(); return; } } // Spawn new wave if all mutants gone if (mutants.length === 0 && spawnTimer === 0) { spawnTimer = 40; // Wait 40 ticks before next wave } if (spawnTimer > 0) { spawnTimer--; if (spawnTimer === 0) { spawnMutantWave(); } } }; // Reset game state on restart game.on('reset', function () { // Remove all objects for (var i = 0; i < mutants.length; i++) { mutants[i].destroy(); } for (var i = 0; i < heroBullets.length; i++) { heroBullets[i].destroy(); } for (var i = 0; i < mutantBullets.length; i++) { mutantBullets[i].destroy(); } mutants = []; heroBullets = []; mutantBullets = []; score = 0; scoreTxt.setText(score); wave = 1; spawnTimer = 0; gameOver = false; bossSpawned = false; hero.x = 2048 / 2; hero.y = 2732 - 350; spawnMutantWave(); LK.playMusic('bgmusic'); });