There's a new (and reasonably priced) memory puzzle game on Kindle today,
Match Genius (A Memory Puzzle Game) ($2.99), by Sonic Boom. This is the kind of game I've see mentioned in several studies recently on improving memory and staving off aging of the brain.
Game Description
Play Match Genius, a puzzle game that exercises your concentration, memory and cognitive skills on Kindle - anytime, anywhere.
In Match Genius, you flip over a tile to reveal a symbol underneath. By flipping other tiles you match the pairs of symbols. Match tiles in as few moves as possible to get the highest scores. Pay careful attention to the different shades and orientation for each symbol. Certain shapes are almost identical, which can trick an unfocused player.
Match Genius is a fun game for all ages with 6 levels of difficulty, ranging from Easy to Genius. The game automatically saves your progress and keeps a tally of your stats, scores and rank. Become a Match Genius on Kindle today!