There are more than 20 popular subjects currently. We are going to add more when we get feedback from you as customers. The puzzle appears in a grid format either in a 8x8, 9x9, or 10x10 size at your choice. The amount of words provided in the lists varies per puzzle. You can only work on one word a time. The words in the list are found in all directions in the grid: vertically, horizontally, diagonally and backward. If you are big fan of words puzzle like Wonderword, you are going to love this one. Enjoy it, have fun!