/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Animal class var Animal = Container.expand(function () { var self = Container.call(this); self.type = null; self.asset = null; self.setType = function (type) { self.type = type; if (self.asset) { self.removeChild(self.asset); } self.asset = self.attachAsset(type, { anchorX: 0.5, anchorY: 0.5 }); }; return self; }); // Snake Segment (body or head) var SnakeSegment = Container.expand(function () { var self = Container.call(this); self.asset = null; self.setType = function (type) { if (self.asset) { self.removeChild(self.asset); } var assetId = type === 'head' ? 'snakeHead' : 'snakeBody'; self.asset = self.attachAsset(assetId, { anchorX: 0.5, anchorY: 0.5 }); }; self.setType('body'); return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x222222 }); /**** * Game Code ****/ // Animal assets: pig, cat, bee, frog (box/ellipse with different colors) // Game constants var GAME_WIDTH = 2048; var GAME_HEIGHT = 2732; var SNAKE_START_LENGTH = 3; var SNAKE_START_SPEED = 8; // pixels per tick var SNAKE_SPEED_INCREMENT = 1.5; // speed up per sequence var SNAKE_MAX_SPEED = 32; var SEGMENT_SPACING = 90; // px between segments var ANIMAL_TYPES = ['pig', 'cat', 'bee', 'frog']; var ANIMAL_NAMES = { pig: "Pig", cat: "Cat", bee: "Bee", frog: "Frog" }; // Game state var snake = []; var snakeDir = { x: 0, y: -1 }; // start moving up var snakeNextDir = { x: 0, y: -1 }; var snakeSpeed = SNAKE_START_SPEED; var snakePositions = []; // for body following var animals = []; var currentTargetIndex = 0; // which animal in sequence to eat next var score = 0; var sequenceCount = 0; var isGameOver = false; var moveCooldown = 0; // for swipe input var dragStart = null; // GUI var scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); var orderTxt = new Text2('', { size: 70, fill: "#fff" }); orderTxt.anchor.set(0.5, 0); LK.gui.top.addChild(orderTxt); orderTxt.y = 130; // Helper: get random position for animal, not too close to snake head function getRandomAnimalPos() { var margin = 180; var tries = 0; while (tries < 20) { var x = margin + Math.random() * (GAME_WIDTH - 2 * margin); var y = margin + Math.random() * (GAME_HEIGHT - 2 * margin); // Avoid spawning too close to snake head var dx = x - snake[0].x; var dy = y - snake[0].y; if (dx * dx + dy * dy > 400 * 400) { return { x: x, y: y }; } tries++; } // fallback return { x: margin + Math.random() * (GAME_WIDTH - 2 * margin), y: margin + Math.random() * (GAME_HEIGHT - 2 * margin) }; } // Helper: update order text function updateOrderText() { var s = ''; for (var i = 0; i < ANIMAL_TYPES.length; i++) { if (i === currentTargetIndex) { s += '[b]' + ANIMAL_NAMES[ANIMAL_TYPES[i]] + '[/b] '; } else { s += ANIMAL_NAMES[ANIMAL_TYPES[i]] + ' '; } } orderTxt.setText(s.trim()); } // Helper: spawn all animals function spawnAnimals() { // Remove old for (var i = 0; i < animals.length; i++) { animals[i].destroy(); } animals = []; for (var i = 0; i < ANIMAL_TYPES.length; i++) { var animal = new Animal(); animal.setType(ANIMAL_TYPES[i]); var pos = getRandomAnimalPos(); animal.x = pos.x; animal.y = pos.y; animals.push(animal); game.addChild(animal); } } // Helper: reset snake function resetSnake() { for (var i = 0; i < snake.length; i++) { snake[i].destroy(); } snake = []; snakePositions = []; var startX = GAME_WIDTH / 2; var startY = GAME_HEIGHT / 2 + 300; for (var i = 0; i < SNAKE_START_LENGTH; i++) { var seg = new SnakeSegment(); seg.setType(i === 0 ? 'head' : 'body'); seg.x = startX; seg.y = startY + i * SEGMENT_SPACING; snake.push(seg); game.addChild(seg); snakePositions.push({ x: seg.x, y: seg.y }); } snakeDir = { x: 0, y: -1 }; snakeNextDir = { x: 0, y: -1 }; } // Helper: grow snake function growSnake() { var last = snake[snake.length - 1]; var seg = new SnakeSegment(); seg.setType('body'); seg.x = last.x; seg.y = last.y; snake.push(seg); game.addChild(seg); snakePositions.push({ x: seg.x, y: seg.y }); } // Helper: check self collision function checkSelfCollision() { var head = snake[0]; for (var i = 2; i < snake.length; i++) { var seg = snake[i]; var dx = head.x - seg.x; var dy = head.y - seg.y; if (dx * dx + dy * dy < 60 * 60) { return true; } } return false; } // Helper: check wall collision function checkWallCollision() { var head = snake[0]; var margin = 40; if (head.x < margin || head.x > GAME_WIDTH - margin || head.y < margin || head.y > GAME_HEIGHT - margin) { return true; } return false; } // Helper: check animal collision function checkAnimalCollision() { var head = snake[0]; for (var i = 0; i < animals.length; i++) { var animal = animals[i]; var dx = head.x - animal.x; var dy = head.y - animal.y; if (dx * dx + dy * dy < 80 * 80) { return i; } } return -1; } // Helper: handle eating animal function eatAnimal(idx) { var animal = animals[idx]; if (animal.type === ANIMAL_TYPES[currentTargetIndex]) { // Correct animal growSnake(); score++; scoreTxt.setText(score); // Remove and respawn this animal animal.destroy(); animals.splice(idx, 1); // Next in sequence currentTargetIndex++; if (currentTargetIndex >= ANIMAL_TYPES.length) { // Sequence complete sequenceCount++; currentTargetIndex = 0; // Speed up snakeSpeed = Math.min(snakeSpeed + SNAKE_SPEED_INCREMENT, SNAKE_MAX_SPEED); // Respawn all animals spawnAnimals(); // Flash green LK.effects.flashScreen(0x00ff00, 400); } else { // Only respawn this animal var newAnimal = new Animal(); newAnimal.setType(animal.type); var pos = getRandomAnimalPos(); newAnimal.x = pos.x; newAnimal.y = pos.y; animals.push(newAnimal); game.addChild(newAnimal); } updateOrderText(); } else { // Wrong animal: game over LK.effects.flashScreen(0xff0000, 800); isGameOver = true; LK.showGameOver(); } } // Helper: handle game over function handleGameOver() { isGameOver = true; // LK.showGameOver() already called } // Input: swipe to change direction function getSwipeDir(dx, dy) { if (Math.abs(dx) > Math.abs(dy)) { return { x: dx > 0 ? 1 : -1, y: 0 }; } else { return { x: 0, y: dy > 0 ? 1 : -1 }; } } // Input: touch/drag game.down = function (x, y, obj) { dragStart = { x: x, y: y }; }; game.up = function (x, y, obj) { dragStart = null; }; game.move = function (x, y, obj) { if (dragStart && !isGameOver) { var dx = x - dragStart.x; var dy = y - dragStart.y; if (dx * dx + dy * dy > 80 * 80) { var dir = getSwipeDir(dx, dy); // Prevent reversing if (!(dir.x === -snakeDir.x && dir.y === -snakeDir.y)) { snakeNextDir = dir; } dragStart = null; } } }; // Main update loop game.update = function () { if (isGameOver) return; // Move snake // Update direction if (snakeNextDir.x !== snakeDir.x || snakeNextDir.y !== snakeDir.y) { snakeDir = { x: snakeNextDir.x, y: snakeNextDir.y }; } // Calculate new head position var head = snake[0]; var newX = head.x + snakeDir.x * snakeSpeed; var newY = head.y + snakeDir.y * snakeSpeed; // Store previous positions snakePositions.unshift({ x: newX, y: newY }); if (snakePositions.length > snake.length * SEGMENT_SPACING / snakeSpeed + 2) { snakePositions.pop(); } // Move segments for (var i = 0; i < snake.length; i++) { var posIdx = Math.min(i * Math.floor(SEGMENT_SPACING / snakeSpeed), snakePositions.length - 1); var pos = snakePositions[posIdx]; snake[i].x = pos.x; snake[i].y = pos.y; } // Check wall collision if (checkWallCollision()) { LK.effects.flashScreen(0xff0000, 800); handleGameOver(); LK.showGameOver(); return; } // Check self collision if (checkSelfCollision()) { LK.effects.flashScreen(0xff0000, 800); handleGameOver(); LK.showGameOver(); return; } // Check animal collision var animalIdx = checkAnimalCollision(); if (animalIdx !== -1) { eatAnimal(animalIdx); } }; // Game start/reset function startGame() { isGameOver = false; score = 0; sequenceCount = 0; snakeSpeed = SNAKE_START_SPEED; currentTargetIndex = 0; scoreTxt.setText(score); updateOrderText(); resetSnake(); spawnAnimals(); } startGame();