/**** * Classes ****/ // Bullet class representing the bullets shot by the hero var Bullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('bullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 10; self.target = enemies[0]; // Set the target to the first enemy self.update = function () { // If the target is destroyed, keep moving in the current direction if (!self.target || !game.children.includes(self.target)) { self.x += self.speed * Math.cos(self.angle); self.y += self.speed * Math.sin(self.angle); } else { // Move the bullet towards the target var dx = self.target.x - self.x; var dy = self.target.y - self.y; var distance = Math.sqrt(dx * dx + dy * dy); if (distance > 0) { self.angle = Math.atan2(dy, dx); // Update the angle towards the target self.x += self.speed * dx / distance; self.y += self.speed * dy / distance; } } }; }); // Enemy class representing enemies in the game var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 2 * difficulty; self.update = function () { // Move the enemy towards the hero var dx = hero.x - self.x; var dy = hero.y - self.y; var distance = Math.sqrt(dx * dx + dy * dy); if (distance > 0) { self.x += self.speed * dx / distance; self.y += self.speed * dy / distance; } }; }); // // // Hero class representing the main character var Hero = Container.expand(function () { var self = Container.call(this); var heroGraphics = self.attachAsset('hero', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5; self.update = function () { // Move the hero towards the touch point var dx = game.touchX - self.x; var dy = game.touchY - self.y; var distance = Math.sqrt(dx * dx + dy * dy); if (distance > 0) { self.x += self.speed * dx / distance; self.y += self.speed * dy / distance; } // Shoot a bullet every 30 frames only if there are enemies if (LK.ticks % 30 == 0 && enemies.length > 0) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; game.addChild(bullet); } }; }); // Princess class representing the character to be rescued var Princess = Container.expand(function () { var self = Container.call(this); var princessGraphics = self.attachAsset('princess', { anchorX: 0.5, anchorY: 0.5 }); }); // Sword class representing the sword in the game var Sword = Container.expand(function () { var self = Container.call(this); var swordGraphics = self.attachAsset('sword', { anchorX: 0.5, anchorY: 0.5 }); }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 //Init game with black background }); /**** * Game Code ****/ // Initialize hero, enemies, sword, and princess var hero = game.addChild(new Hero()); hero.x = 1024; hero.y = 1366; var enemies = []; var enemyWaveTimer = null; var enemyWaveCount = 0; var enemyCount = 0; var sword = new Sword(); game.addChild(sword); var princess = null; var level = 1; var difficulty = 1; // Game update logic game.update = function () { // Update hero position hero.update(); // Update enemies for (var i = 0; i < enemies.length; i++) { enemies[i].update(); } // Check for collision between hero and enemies for (var i = 0; i < enemies.length; i++) { if (hero.intersects(enemies[i])) { // Handle collision with enemy LK.showGameOver(); } } // Check for collision between hero and princess if (princess && hero.intersects(princess)) { // Handle rescue of princess LK.showYouWin(); // Increase level and difficulty level++; difficulty = level; princess = null; } // Create a new enemy every 0.5-2 seconds until there are 3-5 enemies in a wave if (enemyWaveTimer === null && enemies.length < 20) { enemyWaveTimer = LK.setInterval(function () { for (var i = 0; i < Math.floor(Math.random() * difficulty) + 3; i++) { var enemy = new Enemy(); do { enemy.x = Math.random() * 2048; enemy.y = Math.random() * 2732; } while (Math.abs(hero.x - enemy.x) < 200 && Math.abs(hero.y - enemy.y) < 200); enemies.push(enemy); game.addChild(enemy); } enemyWaveCount++; if (enemyWaveCount >= 3 && enemyWaveCount <= 5) { enemyWaveCount = 0; LK.clearInterval(enemyWaveTimer); enemyWaveTimer = null; } }, Math.random() * 1500 + 500); } // Update bullets and check for collision with enemies for (var i = game.children.length - 1; i >= 0; i--) { var child = game.children[i]; if (child instanceof Bullet) { child.update(); for (var j = 0; j < enemies.length; j++) { if (child.intersects(enemies[j])) { // Handle collision between bullet and enemy game.removeChild(child); game.removeChild(enemies[j]); enemies.splice(j, 1); child.destroy(); // Destroy the bullet enemyCount++; if (enemyCount === 20) { princess = new Princess(); princess.x = Math.random() * 2048; princess.y = Math.random() * 2732; game.addChild(princess); } break; } } } } }; // Handle touch events for moving the hero game.down = function (x, y, obj) { game.touchX = x; game.touchY = y; }; game.move = function (x, y, obj) { game.touchX = x; game.touchY = y; }; game.up = function (x, y, obj) { game.touchX = null; game.touchY = null; };