If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
In this game you need to finish the crossword puzzle without using any clues. When you put the mouse cursor over a block, other blocks with the same letter will also be highlighted, and then you can go and select the letter to fill in these blocks. You can press the hint button to have one answer filled in for you, but you will have a 20 second penalty.
This game is played by mouse only.