/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1"); /**** * Classes ****/ var Food = Container.expand(function (isBonus) { var self = Container.call(this); var foodGraphics; if (isBonus) { foodGraphics = self.attachAsset('bonusFood', { anchorX: 0.5, anchorY: 0.5 }); self.points = 5; self.isBonus = true; } else { foodGraphics = self.attachAsset('food', { anchorX: 0.5, anchorY: 0.5 }); self.points = 1; self.isBonus = false; } self.gridX = 0; self.gridY = 0; return self; }); var SnakeSegment = Container.expand(function (isHead) { var self = Container.call(this); var segmentGraphics; if (isHead) { segmentGraphics = self.attachAsset('snakeHead', { anchorX: 0.5, anchorY: 0.5 }); } else { segmentGraphics = self.attachAsset('snakeBody', { anchorX: 0.5, anchorY: 0.5 }); } self.gridX = 0; self.gridY = 0; return self; }); var Wall = Container.expand(function () { var self = Container.call(this); var wallGraphics = self.attachAsset('wall', { anchorX: 0.5, anchorY: 0.5 }); self.gridX = 0; self.gridY = 0; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x001122 }); /**** * Game Code ****/ // Game constants var GRID_SIZE = 40; var GRID_WIDTH = 48; // 2048 / 40 = 51.2, using 48 for better centering var GRID_HEIGHT = 60; // 2732 / 40 = 68.3, using 60 for better centering var MOVE_SPEED = 8; // Ticks between moves var INITIAL_LENGTH = 3; // Game variables var snake = []; var direction = { x: 1, y: 0 }; // Moving right initially var nextDirection = { x: 1, y: 0 }; var food = null; var bonusFood = null; var walls = []; var moveCounter = 0; var currentSpeed = MOVE_SPEED; var bonusFoodTimer = 0; var speedBoostTimer = 0; // Calculate grid offset for centering var gridOffsetX = (2048 - GRID_WIDTH * GRID_SIZE) / 2; var gridOffsetY = (2732 - GRID_HEIGHT * GRID_SIZE) / 2; // Score display var scoreTxt = new Text2('Score: 0', { size: 60, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Initialize walls (border) function createWalls() { // Top and bottom walls for (var x = 0; x < GRID_WIDTH; x++) { // Top wall var topWall = new Wall(); topWall.gridX = x; topWall.gridY = 0; topWall.x = gridOffsetX + x * GRID_SIZE + GRID_SIZE / 2; topWall.y = gridOffsetY + GRID_SIZE / 2; walls.push(topWall); game.addChild(topWall); // Bottom wall var bottomWall = new Wall(); bottomWall.gridX = x; bottomWall.gridY = GRID_HEIGHT - 1; bottomWall.x = gridOffsetX + x * GRID_SIZE + GRID_SIZE / 2; bottomWall.y = gridOffsetY + (GRID_HEIGHT - 1) * GRID_SIZE + GRID_SIZE / 2; walls.push(bottomWall); game.addChild(bottomWall); } // Left and right walls for (var y = 1; y < GRID_HEIGHT - 1; y++) { // Left wall var leftWall = new Wall(); leftWall.gridX = 0; leftWall.gridY = y; leftWall.x = gridOffsetX + GRID_SIZE / 2; leftWall.y = gridOffsetY + y * GRID_SIZE + GRID_SIZE / 2; walls.push(leftWall); game.addChild(leftWall); // Right wall var rightWall = new Wall(); rightWall.gridX = GRID_WIDTH - 1; rightWall.gridY = y; rightWall.x = gridOffsetX + (GRID_WIDTH - 1) * GRID_SIZE + GRID_SIZE / 2; rightWall.y = gridOffsetY + y * GRID_SIZE + GRID_SIZE / 2; walls.push(rightWall); game.addChild(rightWall); } } // Initialize snake function createSnake() { var startX = Math.floor(GRID_WIDTH / 2); var startY = Math.floor(GRID_HEIGHT / 2); for (var i = 0; i < INITIAL_LENGTH; i++) { var segment = new SnakeSegment(i === 0); segment.gridX = startX - i; segment.gridY = startY; segment.x = gridOffsetX + segment.gridX * GRID_SIZE + GRID_SIZE / 2; segment.y = gridOffsetY + segment.gridY * GRID_SIZE + GRID_SIZE / 2; snake.push(segment); game.addChild(segment); } } // Spawn regular food function spawnFood() { if (food) { food.destroy(); food = null; } var validPositions = []; for (var x = 1; x < GRID_WIDTH - 1; x++) { for (var y = 1; y < GRID_HEIGHT - 1; y++) { var occupied = false; // Check snake segments for (var i = 0; i < snake.length; i++) { if (snake[i].gridX === x && snake[i].gridY === y) { occupied = true; break; } } // Check bonus food if (bonusFood && bonusFood.gridX === x && bonusFood.gridY === y) { occupied = true; } if (!occupied) { validPositions.push({ x: x, y: y }); } } } if (validPositions.length > 0) { var pos = validPositions[Math.floor(Math.random() * validPositions.length)]; food = new Food(false); food.gridX = pos.x; food.gridY = pos.y; food.x = gridOffsetX + pos.x * GRID_SIZE + GRID_SIZE / 2; food.y = gridOffsetY + pos.y * GRID_SIZE + GRID_SIZE / 2; game.addChild(food); } } // Spawn bonus food function spawnBonusFood() { if (bonusFood) { bonusFood.destroy(); bonusFood = null; } var validPositions = []; for (var x = 1; x < GRID_WIDTH - 1; x++) { for (var y = 1; y < GRID_HEIGHT - 1; y++) { var occupied = false; // Check snake segments for (var i = 0; i < snake.length; i++) { if (snake[i].gridX === x && snake[i].gridY === y) { occupied = true; break; } } // Check regular food if (food && food.gridX === x && food.gridY === y) { occupied = true; } if (!occupied) { validPositions.push({ x: x, y: y }); } } } if (validPositions.length > 0) { var pos = validPositions[Math.floor(Math.random() * validPositions.length)]; bonusFood = new Food(true); bonusFood.gridX = pos.x; bonusFood.gridY = pos.y; bonusFood.x = gridOffsetX + pos.x * GRID_SIZE + GRID_SIZE / 2; bonusFood.y = gridOffsetY + pos.y * GRID_SIZE + GRID_SIZE / 2; game.addChild(bonusFood); // Bonus food flashing effect tween(bonusFood, { alpha: 0.3 }, { duration: 500, easing: tween.easeInOut, onFinish: function onFinish() { if (bonusFood) { tween(bonusFood, { alpha: 1 }, { duration: 500, easing: tween.easeInOut }); } } }); } } // Move snake function moveSnake() { // Update direction direction.x = nextDirection.x; direction.y = nextDirection.y; // Calculate new head position var head = snake[0]; var newX = head.gridX + direction.x; var newY = head.gridY + direction.y; // Check wall collision if (newX <= 0 || newX >= GRID_WIDTH - 1 || newY <= 0 || newY >= GRID_HEIGHT - 1) { LK.showGameOver(); return; } // Check self collision for (var i = 0; i < snake.length; i++) { if (snake[i].gridX === newX && snake[i].gridY === newY) { LK.showGameOver(); return; } } // Check food collision var ateFood = false; var ateBonus = false; if (food && food.gridX === newX && food.gridY === newY) { ateFood = true; LK.setScore(LK.getScore() + food.points); LK.getSound('eat').play(); food.destroy(); food = null; spawnFood(); } if (bonusFood && bonusFood.gridX === newX && bonusFood.gridY === newY) { ateBonus = true; LK.setScore(LK.getScore() + bonusFood.points); LK.getSound('bonus').play(); bonusFood.destroy(); bonusFood = null; bonusFoodTimer = 0; // Speed boost speedBoostTimer = 300; // 5 seconds at 60fps currentSpeed = Math.max(2, MOVE_SPEED - 4); } // Create new head var newHead = new SnakeSegment(true); newHead.gridX = newX; newHead.gridY = newY; newHead.x = gridOffsetX + newX * GRID_SIZE + GRID_SIZE / 2; newHead.y = gridOffsetY + newY * GRID_SIZE + GRID_SIZE / 2; // Convert old head to body var oldHead = snake[0]; oldHead.removeChild(oldHead.children[0]); var bodyGraphics = oldHead.attachAsset('snakeBody', { anchorX: 0.5, anchorY: 0.5 }); snake.unshift(newHead); game.addChild(newHead); // Remove tail if no food eaten if (!ateFood && !ateBonus) { var tail = snake.pop(); tail.destroy(); } // Update score display scoreTxt.setText('Score: ' + LK.getScore()); // Increase speed based on score var baseSpeed = Math.max(3, MOVE_SPEED - Math.floor(LK.getScore() / 10)); if (speedBoostTimer <= 0) { currentSpeed = baseSpeed; } } // Touch controls var touchStartX = 0; var touchStartY = 0; var minSwipeDistance = 50; game.down = function (x, y, obj) { touchStartX = x; touchStartY = y; }; game.up = function (x, y, obj) { var deltaX = x - touchStartX; var deltaY = y - touchStartY; var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY); if (distance >= minSwipeDistance) { if (Math.abs(deltaX) > Math.abs(deltaY)) { // Horizontal swipe if (deltaX > 0 && direction.x !== -1) { nextDirection = { x: 1, y: 0 }; // Right } else if (deltaX < 0 && direction.x !== 1) { nextDirection = { x: -1, y: 0 }; // Left } } else { // Vertical swipe if (deltaY > 0 && direction.y !== -1) { nextDirection = { x: 0, y: 1 }; // Down } else if (deltaY < 0 && direction.y !== 1) { nextDirection = { x: 0, y: -1 }; // Up } } } }; // Initialize game elements createWalls(); createSnake(); spawnFood(); // Play background music LK.playMusic('gameMusic'); // Game update loop game.update = function () { moveCounter++; // Move snake if (moveCounter >= currentSpeed) { moveSnake(); moveCounter = 0; } // Update speed boost timer if (speedBoostTimer > 0) { speedBoostTimer--; } // Spawn bonus food occasionally bonusFoodTimer++; if (bonusFoodTimer >= 600 && !bonusFood && Math.random() < 0.02) { // 10 seconds minimum, 2% chance per tick spawnBonusFood(); bonusFoodTimer = 0; } // Remove bonus food after some time if (bonusFood && bonusFoodTimer >= 900) { // 15 seconds bonusFood.destroy(); bonusFood = null; bonusFoodTimer = 0; } };