Blocks With Letters On:- The Object of each level is to move the letter blocks into the yellow area, to form an English word. Select a block using the mouse or the space bar, then use the Keyboard arrow keys to move the selected block left or Right. Each level has only one possible answer. If you get stuck, have a peek under the clue flap and the first letter will be revealed. Use your clues wisely, you only get 10 throughout the game.