To start: To start the game, click on any cell of the grid with the mouse. The corresponding clue should appear in the panel.
Basic navigation: Use the arrow keys to move around the grid. You can also use the mouse to quickly go from one cell to another. To switch orientation, you can either use the space bar or click the cursor.
Filling the grid: To fill the grid simply type in your answer and the cursor will automatically move to the next cell. If a letter is incorrect, it will appear in red. To correct a letter, position the cursor on it and type your answer. Alternatively, you can erase a letter by using backspace.
If you get stuck: You can use the Reveal Letter or Reveal Word buttons to solve the letter or word under the cursor.
Advanced navigation: You can use the Tab/Shift+Tab to move forward/backward one word at a time. Correct words will be automatically skipped. Combined with the space bar to switch orientation, this is the quickest way to complete a puzzle.