The words move slowly, and if you does not catch the correct answer before word reaches the line in the bottom - the game will be over.
The first half of the time, you can see the hint in the bottom. The second half of the time - you can see the correct word, which still need to make.
The faster you construct a word - the more points you get as result.
The game has 12 levels from simple to very complex. Each level is different in:
1. Number of rounds
2. The length of the word
3. Time for Round