-Put in order the letters shown, to correctly spell a word. The mixed up word is shown on top.  You must slide the letters down into the empty boxes.  You do this by clicking on a letter and dragging it in its proper position below while keeping the button of the mouse in the downward position; when the letter is in the right place, you release the mouse button. 
-You can slide the letters sideways.

-The left hand cylinder shows the number of words correctly spelled.  To win, you must reach the top.  

-Three hints are available, as one clicks on the corresponding button.  This places corrects letters in the first, second and third position, successively. The background image gives a further hint as to which type of word is seeked.

-After three hints, the «Hint» button  becomes unavailable ( gray ).  The bottom button gives the correct answer, but no point. 

-The number showing up in the small box at the bottom reflects the quality of the guess.