So, first, if you look at the tutorial, then every new game you start actually just reruns the tutorial, which isn't great.
Also, though: how does this game even work? For instance, one of my rows of three stones started GUB. There aren't any words that start with GUB (well, OK, "gubernatorial", but that's more than seven letters). What are you supposed to do with that row?
Or: another row started ORB. OK, I put an S after that, and hooray, it's a word. But then what? Is the only way to get a seven letter word to form a four-letter word, then add a letter to make a word, then do that two more times?
The tutorial wasn't particularly helpful in this regard. How are you supposed to play it?