Okay, so you have these letters, right? You can combine them into words, You click on the word to get a score for the number/type of letters you have in the word.
If two or more words share any letters, they join into a group, When you clear the group, you get a multiplier score for each word in the group.
There are three modes, an Endless Mode, Matrix Mode, and Puzzle Mode.
In the Endless Mode, new letters spawn and are added to the grid every time the timer bar runs out. The new letters spawn faster and faster as time goes on.
In the Matrix Mode, every tile in the grid is filled in, and the goal is to clear all of the letters to get the highest score you can.
In the Puzzle mode, you get a 4x4 grid of scrambled letters, where you need to make each row word match each column word.