Double Vision - Brain Training

An addicting game of doubles! Train your brain while having fun! A grid of letters is displayed before you. Select the only letter that appears on the grid twice. See how quickly you can get through 10 puzzles and try and beat your friends!

Three game modes!
Easy 3x3 - How quickly can you solve 10 puzzles?
Hard 4x4 - How quickly can you solve 10 puzzles?
Speed Mode - How many can you get in a row?

Enhance your memory and increase your reaction time! Master easy mode, and then try to match your score in Hard mode!

Please let me know if you run into any problems or have any suggestions on how to improve this game!