Cubical: free arcade puzzle game for iphone, ipad

The object in Cubical it to score points by tapping all the squares of the same color before time runs out. The squares keep changing colors so it's a bit frantic. Definitely good for kids, but all adults should engage in these types of games now and then. At least to ward off Alzheimer's.
https://itunes.apple.com/us/app/cubical/id897021508?ls=1&mt=8