/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Food class var Food = Container.expand(function (fruitType) { var self = Container.call(this); // Default to apple if not specified var type = fruitType || 'apple'; var assetId = 'food_' + type; var food = self.attachAsset(assetId, { anchorX: 0.5, anchorY: 0.5 }); self.fruitType = type; return self; }); // Snake Head class var SnakeHead = Container.expand(function () { var self = Container.call(this); var head = self.attachAsset('snakeHead', { anchorX: 0.5, anchorY: 0.5 }); return self; }); // Snake Segment class var SnakeSegment = Container.expand(function () { var self = Container.call(this); var body = self.attachAsset('snakeBody', { anchorX: 0.5, anchorY: 0.5 }); return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x222222 }); /**** * Game Code ****/ // Game constants // Snake head: green ellipse // Snake body: lighter green ellipse // Food: red ellipse // Fruit assets // Snake assets var GRID_SIZE = 80; // Each cell is 80x80 px var GRID_COLS = Math.floor(2048 / GRID_SIZE); var GRID_ROWS = Math.floor(2732 / GRID_SIZE); // Directions var DIR_UP = 0, DIR_RIGHT = 1, DIR_DOWN = 2, DIR_LEFT = 3; // Snake state var snake = []; var snakeDir = DIR_RIGHT; var nextDir = DIR_RIGHT; var pendingGrowth = 0; // Food state var food = null; // Score var score = 0; var level = 1; var scoreTxt = new Text2('0', { size: 120, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); scoreTxt.y = 600; // Move score lower for better grouping at y=600 LK.gui.top.addChild(scoreTxt); var levelTxt = new Text2('Level 1', { size: 80, fill: 0xFFD700 }); levelTxt.anchor.set(0.5, 0); levelTxt.y = scoreTxt.y + scoreTxt.height + 10; // Place level just below score LK.gui.top.addChild(levelTxt); // Helper: get grid-aligned position function gridPos(col, row) { return { x: col * GRID_SIZE + GRID_SIZE / 2, y: row * GRID_SIZE + GRID_SIZE / 2 }; } // Helper: get random empty cell function getRandomEmptyCell() { var occupied = {}; for (var i = 0; i < snake.length; i++) { occupied[snake[i].col + ',' + snake[i].row] = true; } var empty = []; for (var c = 0; c < GRID_COLS; c++) { for (var r = 0; r < GRID_ROWS; r++) { if (!occupied[c + ',' + r]) empty.push({ col: c, row: r }); } } if (empty.length === 0) return null; var idx = Math.floor(Math.random() * empty.length); return empty[idx]; } // Initialize snake in center function resetSnake() { // Remove old snake for (var i = 0; i < snake.length; i++) { snake[i].destroy(); } snake = []; var startCol = Math.floor(GRID_COLS / 2); var startRow = Math.floor(GRID_ROWS / 2); // Head var head = new SnakeHead(); head.col = startCol; head.row = startRow; var pos = gridPos(startCol, startRow); head.x = pos.x; head.y = pos.y; game.addChild(head); snake.push(head); // 2 body segments for (var i = 1; i <= 2; i++) { var seg = new SnakeSegment(); seg.col = startCol - i; seg.row = startRow; var pos2 = gridPos(seg.col, seg.row); seg.x = pos2.x; seg.y = pos2.y; game.addChild(seg); snake.push(seg); } snakeDir = DIR_RIGHT; nextDir = DIR_RIGHT; pendingGrowth = 0; } // Place food at random empty cell function placeFood() { if (food) food.destroy(); var cell = getRandomEmptyCell(); if (!cell) return; // Pick a random fruit type var fruitTypes = ['apple', 'banana', 'grape', 'orange']; var idx = Math.floor(Math.random() * fruitTypes.length); var fruitType = fruitTypes[idx]; food = new Food(fruitType); food.col = cell.col; food.row = cell.row; var pos = gridPos(cell.col, cell.row); food.x = pos.x; food.y = pos.y; game.addChild(food); } // Check collision with self or wall function checkCollision(col, row) { // Wall if (col < 0 || col >= GRID_COLS || row < 0 || row >= GRID_ROWS) return true; // Self for (var i = 0; i < snake.length; i++) { if (snake[i].col === col && snake[i].row === row) return true; } return false; } // Move snake one step function moveSnake() { // Compute new head position var head = snake[0]; var dcol = 0, drow = 0; if (snakeDir === DIR_UP) drow = -1;else if (snakeDir === DIR_DOWN) drow = 1;else if (snakeDir === DIR_LEFT) dcol = -1;else if (snakeDir === DIR_RIGHT) dcol = 1; var newCol = head.col + dcol; var newRow = head.row + drow; // Check collision for (var i = 0; i < snake.length; i++) { if (snake[i].col === newCol && snake[i].row === newRow) { // Collided with self LK.effects.flashScreen(0xff0000, 800); LK.showGameOver(); return; } } if (newCol < 0 || newCol >= GRID_COLS || newRow < 0 || newRow >= GRID_ROWS) { // Collided with wall LK.effects.flashScreen(0xff0000, 800); LK.showGameOver(); return; } // Move body segments for (var i = snake.length - 1; i > 0; i--) { snake[i].col = snake[i - 1].col; snake[i].row = snake[i - 1].row; } head.col = newCol; head.row = newRow; // Animate movement for (var i = 0; i < snake.length; i++) { var pos = gridPos(snake[i].col, snake[i].row); tween(snake[i], { x: pos.x, y: pos.y }, { duration: 80, easing: tween.linear }); } // Check food collision if (food && head.col === food.col && head.row === food.row) { // Eat food pendingGrowth += 1; score += 1; LK.setScore(score); scoreTxt.setText(score); // Level up every 5 points var prevLevel = level; level = Math.floor(score / 5) + 1; if (level !== prevLevel) { levelTxt.setText('Level ' + level); // Optional: flash level text or add effect LK.effects.flashObject(levelTxt, 0xFFD700, 600); } placeFood(); } // Grow if needed if (pendingGrowth > 0) { var tail = snake[snake.length - 1]; var newSeg = new SnakeSegment(); newSeg.col = tail.col; newSeg.row = tail.row; var pos2 = gridPos(newSeg.col, newSeg.row); newSeg.x = pos2.x; newSeg.y = pos2.y; game.addChild(newSeg); snake.push(newSeg); pendingGrowth -= 1; } } // Touch controls: swipe to change direction var touchStartX = null, touchStartY = null; game.down = function (x, y, obj) { touchStartX = x; touchStartY = y; }; game.up = function (x, y, obj) { if (touchStartX === null || touchStartY === null) return; var dx = x - touchStartX; var dy = y - touchStartY; if (Math.abs(dx) > Math.abs(dy)) { // Horizontal swipe if (dx > 40 && snakeDir !== DIR_LEFT) nextDir = DIR_RIGHT;else if (dx < -40 && snakeDir !== DIR_RIGHT) nextDir = DIR_LEFT; } else { // Vertical swipe if (dy > 40 && snakeDir !== DIR_UP) nextDir = DIR_DOWN;else if (dy < -40 && snakeDir !== DIR_DOWN) nextDir = DIR_UP; } touchStartX = null; touchStartY = null; }; // Also allow tap on left/right/top/bottom of screen to change direction game.move = function (x, y, obj) { // No drag for snake }; // Game update: move snake every N ticks var MOVE_INTERVAL = 10; // Lower = faster var moveTick = 0; game.update = function () { if (snake.length === 0) { resetSnake(); score = 0; LK.setScore(0); scoreTxt.setText('0'); level = 1; levelTxt.setText('Level 1'); placeFood(); moveTick = 0; return; } moveTick++; if (moveTick >= MOVE_INTERVAL) { // Only allow 90-degree turns (no reverse) if (snakeDir === DIR_UP && nextDir !== DIR_DOWN || snakeDir === DIR_DOWN && nextDir !== DIR_UP || snakeDir === DIR_LEFT && nextDir !== DIR_RIGHT || snakeDir === DIR_RIGHT && nextDir !== DIR_LEFT) { snakeDir = nextDir; } moveSnake(); moveTick = 0; } }; // Center score text horizontally scoreTxt.setText('0'); scoreTxt.anchor.set(0.5, 0); // Initial setup resetSnake(); placeFood();