I've been playing this game on the Kindle for a few days, and wanted to share. It's challenging (there's a timed option), and fun, and best of all, it's free.
Your goal is to find words in a 5 high grid of letters. Find words by selecting one letter from each column. On each level there are ten pairs of shapes. Make words matching each shape on the left with the same shape on the right to unlock the next level. After matching all shapes you can continue to find the rest of the words for a higher score or immediately move on to the next level.
The game progresses through 4 levels of difficulty, with grids that increase from 4 to 7 letters across. Each word you find is worth 20 points per letter, and if you find all of the qualifying words you get an 800 point bonus! Try to beat the clock or take your time in relaxed mode. The game tracks separate high scores for each mode.