Select a word one letter at-a-time then tap Submit to score.
Totally free. No in-app purchases.
The word will then be removed from the board and remaining letters, plus one row of extra letters, will fall into place.
Try to submit longer words to avoid being overwhelmed by new letters.
Words must be two or more letters.
2 letters = 4 points
3 letters = 9 points
4 letters = 16 points
5 letters = 25 points
etc...