/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Food = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('food', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Simple pulsing animation
		var scale = 1 + Math.sin(LK.ticks * 0.1) * 0.1;
		self.scaleX = scale;
		self.scaleY = scale;
	};
	return self;
});
var SnakeSegment = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('snakeBody', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
// Game configuration
var GRID_SIZE = 40;
var BOARD_WIDTH = 20;
var BOARD_HEIGHT = 30;
var MOVE_DELAY = 8; // Frames between moves
// Game state variables
var snake = [];
var snakeDirection = {
	x: 1,
	y: 0
};
var nextDirection = {
	x: 1,
	y: 0
};
var food = null;
var moveCounter = 0;
var isGameRunning = true;
// Calculate board position to center it
var boardOffsetX = (2048 - BOARD_WIDTH * GRID_SIZE) / 2;
var boardOffsetY = (2732 - BOARD_HEIGHT * GRID_SIZE) / 2;
// Create score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize snake with 3 segments
function initializeSnake() {
	snake = [];
	// Create head
	var head = game.addChild(new SnakeSegment());
	head.attachAsset('snakeHead', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	head.x = boardOffsetX + 5 * GRID_SIZE;
	head.y = boardOffsetY + 15 * GRID_SIZE;
	snake.push({
		x: 5,
		y: 15,
		obj: head
	});
	// Create initial body segments
	for (var i = 1; i < 3; i++) {
		var segment = game.addChild(new SnakeSegment());
		segment.x = boardOffsetX + (5 - i) * GRID_SIZE;
		segment.y = boardOffsetY + 15 * GRID_SIZE;
		snake.push({
			x: 5 - i,
			y: 15,
			obj: segment
		});
	}
}
// Convert grid coordinates to screen coordinates
function gridToScreen(gridX, gridY) {
	return {
		x: boardOffsetX + gridX * GRID_SIZE,
		y: boardOffsetY + gridY * GRID_SIZE
	};
}
// Generate random food position
function spawnFood() {
	var validPositions = [];
	// Find all valid positions (not occupied by snake)
	for (var x = 0; x < BOARD_WIDTH; x++) {
		for (var y = 0; y < BOARD_HEIGHT; y++) {
			var occupied = false;
			for (var i = 0; i < snake.length; i++) {
				if (snake[i].x === x && snake[i].y === y) {
					occupied = true;
					break;
				}
			}
			if (!occupied) {
				validPositions.push({
					x: x,
					y: y
				});
			}
		}
	}
	if (validPositions.length > 0) {
		var randomIndex = Math.floor(Math.random() * validPositions.length);
		var pos = validPositions[randomIndex];
		if (food) {
			food.destroy();
		}
		food = game.addChild(new Food());
		var screenPos = gridToScreen(pos.x, pos.y);
		food.x = screenPos.x;
		food.y = screenPos.y;
		food.gridX = pos.x;
		food.gridY = pos.y;
	}
}
// Check if position is valid (within bounds and not colliding with snake)
function isValidPosition(x, y) {
	// Check bounds
	if (x < 0 || x >= BOARD_WIDTH || y < 0 || y >= BOARD_HEIGHT) {
		return false;
	}
	// Check collision with snake body (excluding head)
	for (var i = 1; i < snake.length; i++) {
		if (snake[i].x === x && snake[i].y === y) {
			return false;
		}
	}
	return true;
}
// Move snake
function moveSnake() {
	if (!isGameRunning) return;
	// Update direction
	snakeDirection.x = nextDirection.x;
	snakeDirection.y = nextDirection.y;
	// Calculate new head position
	var head = snake[0];
	var newHeadX = head.x + snakeDirection.x;
	var newHeadY = head.y + snakeDirection.y;
	// Check if new position is valid
	if (!isValidPosition(newHeadX, newHeadY)) {
		// Game over
		isGameRunning = false;
		LK.getSound('gameOver').play();
		LK.showGameOver();
		return;
	}
	// Check if food is eaten
	var ateFood = false;
	if (food && newHeadX === food.gridX && newHeadY === food.gridY) {
		ateFood = true;
		LK.setScore(LK.getScore() + 10);
		scoreTxt.setText('Score: ' + LK.getScore());
		LK.getSound('eat').play();
		// Flash food before removing
		tween(food, {
			alpha: 0
		}, {
			duration: 200
		});
		spawnFood();
	}
	// Move snake segments
	if (!ateFood) {
		// Remove tail if not growing
		var tail = snake.pop();
		tail.obj.destroy();
	}
	// Add new head
	var newHead = game.addChild(new SnakeSegment());
	newHead.attachAsset('snakeHead', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var screenPos = gridToScreen(newHeadX, newHeadY);
	newHead.x = screenPos.x;
	newHead.y = screenPos.y;
	// Convert old head to body
	if (snake.length > 0) {
		var oldHead = snake[0].obj;
		oldHead.removeChildren();
		oldHead.attachAsset('snakeBody', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	snake.unshift({
		x: newHeadX,
		y: newHeadY,
		obj: newHead
	});
}
// Handle direction changes
function changeDirection(newDir) {
	// Prevent immediate reversal
	if (newDir.x === -snakeDirection.x && newDir.y === -snakeDirection.y) {
		return;
	}
	nextDirection.x = newDir.x;
	nextDirection.y = newDir.y;
}
// Touch controls
game.down = function (x, y, obj) {
	if (!isGameRunning) return;
	var centerX = 2048 / 2;
	var centerY = 2732 / 2;
	var dx = x - centerX;
	var dy = y - centerY;
	// Determine direction based on which is greater: horizontal or vertical distance
	if (Math.abs(dx) > Math.abs(dy)) {
		// Horizontal movement
		if (dx > 0) {
			changeDirection({
				x: 1,
				y: 0
			}); // Right
		} else {
			changeDirection({
				x: -1,
				y: 0
			}); // Left
		}
	} else {
		// Vertical movement
		if (dy > 0) {
			changeDirection({
				x: 0,
				y: 1
			}); // Down
		} else {
			changeDirection({
				x: 0,
				y: -1
			}); // Up
		}
	}
};
// Create visible walls around the game board
function createWalls() {
	// Top and bottom walls
	for (var x = -1; x <= BOARD_WIDTH; x++) {
		// Top wall
		var topWall = game.addChild(LK.getAsset('wall', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		topWall.x = boardOffsetX + x * GRID_SIZE;
		topWall.y = boardOffsetY - GRID_SIZE;
		// Bottom wall
		var bottomWall = game.addChild(LK.getAsset('wall', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		bottomWall.x = boardOffsetX + x * GRID_SIZE;
		bottomWall.y = boardOffsetY + BOARD_HEIGHT * GRID_SIZE;
	}
	// Left and right walls
	for (var y = 0; y < BOARD_HEIGHT; y++) {
		// Left wall
		var leftWall = game.addChild(LK.getAsset('wall', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		leftWall.x = boardOffsetX - GRID_SIZE;
		leftWall.y = boardOffsetY + y * GRID_SIZE;
		// Right wall
		var rightWall = game.addChild(LK.getAsset('wall', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		rightWall.x = boardOffsetX + BOARD_WIDTH * GRID_SIZE;
		rightWall.y = boardOffsetY + y * GRID_SIZE;
	}
}
// Initialize game
createWalls();
initializeSnake();
spawnFood();
// Main game loop
game.update = function () {
	if (!isGameRunning) return;
	moveCounter++;
	if (moveCounter >= MOVE_DELAY) {
		moveCounter = 0;
		moveSnake();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -258,9 +258,47 @@
 			}); // Up
 		}
 	}
 };
+// Create visible walls around the game board
+function createWalls() {
+	// Top and bottom walls
+	for (var x = -1; x <= BOARD_WIDTH; x++) {
+		// Top wall
+		var topWall = game.addChild(LK.getAsset('wall', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		}));
+		topWall.x = boardOffsetX + x * GRID_SIZE;
+		topWall.y = boardOffsetY - GRID_SIZE;
+		// Bottom wall
+		var bottomWall = game.addChild(LK.getAsset('wall', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		}));
+		bottomWall.x = boardOffsetX + x * GRID_SIZE;
+		bottomWall.y = boardOffsetY + BOARD_HEIGHT * GRID_SIZE;
+	}
+	// Left and right walls
+	for (var y = 0; y < BOARD_HEIGHT; y++) {
+		// Left wall
+		var leftWall = game.addChild(LK.getAsset('wall', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		}));
+		leftWall.x = boardOffsetX - GRID_SIZE;
+		leftWall.y = boardOffsetY + y * GRID_SIZE;
+		// Right wall
+		var rightWall = game.addChild(LK.getAsset('wall', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		}));
+		rightWall.x = boardOffsetX + BOARD_WIDTH * GRID_SIZE;
+		rightWall.y = boardOffsetY + y * GRID_SIZE;
+	}
+}
 // Initialize game
+createWalls();
 initializeSnake();
 spawnFood();
 // Main game loop
 game.update = function () {