When you are Remixing, add a tile. But if the board is full, you need to divide someone else's tile by 2 near by your tile, if your tile's number is bigger then it's tile and if it's tile is 1 then you need to remove it's tile. Don't change someone else's colour or number. If you have a tile that's same colour, same number, and it is near by, then you can combine two tiles together and multiply it by 2, or else you need to make another tile if the board is not full. If you see a number after 'x', that means if you put a tile into that tile, it will multiply that number. But if you see a tile just with a 'X', that means if you put a tile in it, it will multiply that number by that number e.g. 2x2 4x4 etc.