/**** * Classes ****/ // Define a class for bullets 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.update = function () { self.y += self.speed; if (self.y < 0) { self.destroy(); } }; }); // Define a class for enemies var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 3; self.direction = 1; self.update = function () { // Enemies move side to side without stopping or teleporting self.x += self.speed * self.direction; if (self.x > 2048 - self.width / 2 || self.x < self.width / 2) { self.direction *= -1; } // Enemies fire back at the player if (LK.ticks % 60 == 0) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; bullet.speed = 5; bullets.push(bullet); game.addChild(bullet); } }; }); // Define a class for snake enemies var SnakeEnemy = Container.expand(function () { var self = Container.call(this); var snakeEnemyGraphics = self.attachAsset('snakeEnemy', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 3; self.direction = 1; self.canSplit = true; // Add a property to track if the snake enemy can split self.update = function () { // Snake enemies move side to side without stopping or teleporting self.x += self.speed * self.direction; if (self.x > 2048 - self.width / 2 || self.x < self.width / 2) { self.direction *= -1; } }; }); // // // Define a class for the spaceship var Spaceship = Container.expand(function () { var self = Container.call(this); var spaceshipGraphics = self.attachAsset('spaceship', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5; self.update = function () { // Update logic for spaceship if (LK.ticks % 30 == 0) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; bullets.push(bullet); game.addChild(bullet); } }; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 //Init game with black background }); /**** * Game Code ****/ // Initialize spaceship var spaceship = game.addChild(new Spaceship()); spaceship.x = 1024; spaceship.y = 2500; // Initialize hearts var hearts = []; for (var i = 0; i < 3; i++) { var heart = game.addChild(LK.getAsset('heart', {})); heart.x = 2048 - (i + 1) * 120; heart.y = 2732 - 120; hearts.push(heart); } // Initialize enemies var enemies = []; for (var i = 0; i < 5; i++) { var enemy = new Enemy(); enemy.x = Math.random() * 2048; enemy.y = Math.random() * 1000; enemies.push(enemy); game.addChild(enemy); } // Initialize bullets var bullets = []; // Initialize snake enemies var snakeEnemies = []; // Initialize enemies defeated count var enemiesDefeated = 0; // Handle player movement game.move = function (x, y, obj) { spaceship.x = x; spaceship.y = y; }; // Handle shooting game.down = function (x, y, obj) { var bullet = new Bullet(); bullet.x = spaceship.x; bullet.y = spaceship.y; bullet.lastY = bullet.y; // Initialize lastY for tracking changes on Y bullet.lastIntersecting = false; // Initialize lastIntersecting for tracking changes on intersections bullets.push(bullet); game.addChild(bullet); }; // Update game state game.update = function () { // Update enemies for (var i = 0; i < enemies.length; i++) { enemies[i].update(); } // Update bullets for (var j = bullets.length - 1; j >= 0; j--) { bullets[j].update(); // Update lastY and lastIntersecting for bullets if (bullets[j].lastY === undefined) { bullets[j].lastY = bullets[j].y; } // Initialize lastY for tracking changes on Y if (bullets[j].lastIntersecting === undefined) { bullets[j].lastIntersecting = false; } // Initialize lastIntersecting for tracking changes on intersections bullets[j].lastY = bullets[j].y; bullets[j].lastIntersecting = bullets[j].intersects(spaceship); if (bullets[j].y < 0) { bullets.splice(j, 1); } } // Check for collisions for (var k = bullets.length - 1; k >= 0; k--) { for (var l = enemies.length - 1; l >= 0; l--) { if (bullets[k].intersects(enemies[l])) { bullets[k].destroy(); enemies[l].destroy(); bullets.splice(k, 1); enemies.splice(l, 1); // Increment enemies defeated count enemiesDefeated++; break; } } for (var m = snakeEnemies.length - 1; m >= 0; m--) { if (snakeEnemies[m].lastY === undefined) { snakeEnemies[m].lastY = snakeEnemies[m].y; } if (snakeEnemies[m].lastIntersecting === undefined) { snakeEnemies[m].lastIntersecting = false; } if (bullets[k] && bullets[k].intersects(snakeEnemies[m])) { bullets[k].destroy(); if (bullets[k].y < snakeEnemies[m].y + snakeEnemies[m].height / 2 || !snakeEnemies[m].canSplit) { // If the bullet hits the head of the snake enemy or it has already split, destroy it snakeEnemies[m].destroy(); snakeEnemies.splice(m, 1); } else if (snakeEnemies[m].canSplit) { // If the bullet hits the body of the snake enemy and it can split, split it into two var newSnakeEnemy = new SnakeEnemy(); newSnakeEnemy.x = snakeEnemies[m].x; newSnakeEnemy.y = snakeEnemies[m].y + snakeEnemies[m].height / 2; newSnakeEnemy.canSplit = false; // New snake enemies cannot split again snakeEnemies.push(newSnakeEnemy); game.addChild(newSnakeEnemy); snakeEnemies[m].canSplit = false; // Original snake enemy cannot split again } bullets.splice(k, 1); break; } } } // Add new wave of enemies when all enemies are defeated if (enemies.length == 0) { var numEnemies = Math.floor(Math.random() * 4) + 2; // Random number between 2 and 5 for (var i = 0; i < numEnemies; i++) { var enemy = new Enemy(); enemy.x = Math.random() * 2048; enemy.y = Math.random() * 1000; enemies.push(enemy); game.addChild(enemy); } // Add one snake alien each wave var snakeEnemy = new SnakeEnemy(); snakeEnemy.x = Math.random() * 2048; snakeEnemy.y = Math.random() * 1000; snakeEnemies.push(snakeEnemy); game.addChild(snakeEnemy); } }; // Check if the snake enemy is trying to crash into the player for (var n = snakeEnemies.length - 1; n >= 0; n--) { if (snakeEnemies[n].intersects(spaceship)) { // If the snake enemy crashes into the player, remove a heart var heart = hearts.pop(); heart.destroy(); if (hearts.length == 0) { // If no more hearts, show game over LK.showGameOver(); } break; } } // Check if the player is shot by an alien for (var k = bullets.length - 1; k >= 0; k--) { if (bullets[k].intersects(spaceship)) { // If the player is shot by an alien, remove a heart var heart = hearts.pop(); heart.destroy(); if (hearts.length == 0) { // If no more hearts, show game over LK.showGameOver(); } break; } }