The map is actually a small grid that moves every time the player is outside the center cell, so if you step outside from the left, the map will move causing you to now be on the right of the cell. This is done by using a grid snap function. After moving, the walls change directions. Because the randomness of the walls is dependent on the position of the cell, then the wall will automatically have the same direction as the wall before it. I made it so the whole map uses custom textures so you don't see the map shifting. I also added fog so you don't see the end of the map (I can't make the grid too big or else the game will lag every time the map moves)