really clever idea.
I personally don't have the patience to go through all three levels, but it was really clever.
By the time you finish one of the three, you begin to see the patterns and recognize the letters as their symbols. Then, right before you get comfortable, it switches up. Using famous quotes was useful, but sometimes was a hint. Whether intentional or not, I liked this at the beginning but not so much at the end. What might have made this game more intriguing would have been to expand the sections a bit--have an option for "advanced" without the symbol keyboard (test your memory and recognition), or longer, less well known quotes. As I said earlier, right when I started getting into the groove of things they got switched up. Maybe others have an easier or harder time than me, but I feel that there should be an option of more.
I like this kind of game, so I may be biased a little...
hoping for more games like this... :)