You need only to click and hold on the first letter of the word then drag it until you reach the last letter
Putting together words is an effortless job. Your mouse is all you will need to complete this mission. You need only to click and hold on the first letter of the word, then drag it until you reach the last letter. As you do this, the squares will turn blue. When the whole word is highlighted, you can release the click, and you're done!