Awesome concept for a word game – Substring Review

As someone who likes Words With Friends and other word games, I just really love the idea that this uses a string of letters inside a word -- it is a cool thing to wrap my head around as I play. (For example, a substring in the word "example" is "xam." Who would've thought of that?) I find myself blasting through level after level. Really addictive. Highly recommend.
Review by littleal87 on Substring.