A selected letter can be unselected by clicking on this letter again. You can then immediately build further onto this word. To help you, you can select the Last button to see which was the final word you created. Create a word using all the provided letters to continue to the next round. Try to fill in the entire board with words. You can also type the words on your keyboard and press enter, this allows you to submit words much quicker. If you are ready to submit, click enter to check if you formed a valid word. Select the letters you want to use to create a word by clicking on them.