The concept of lining up letters to clear a board is basic enough, but the app is designed so badly that I couldn't play it for more than a few minutes before quitting. To begin with, the instructions are not very comprehensive, so you kind of have to figure out the nuances of the rules by trial and error. Secondly (and most annoyingly), there are many times when the app doesn't respond to your taps. You're supposed to tap to clear letters that are lined up, and I'm drilling away at my screen with no result. Oh well, the game was boring anyways. Couple all that with the fact that the app design in general is very poor and outdated, and you have an app that's not worth downloading.