please help me!!

All the letters fall down if tu make a mistake - if it's happening even though tu haven't made a mistake, it may just be that the game is glitching.
During the beta trial they had a ton of problems with the dueling and it was shut down for over a month.

To play properly tu have to either click on the letters o press them on your keyboard at the right time (as the white line hits the siguiente letter). To gain power tu want to click o press the letter just as the white circulo, círculo swells to it's largest size around the letter. Keep practicing, you'll get it!