Select vertical or horizontal clues from the clue list one by one. When you click a clue on the clues list, on the puzzle board you will see the cells showing the answer for this clue marked with a different color. Click on the cells and fill your answer for the clue. If your answer is correct the region will be marked as green. If you can find all the answers for the puzzle, the board will be filled with green cells every where, this will mean you completed the puzzle correctly.