Cogs is brilliant. Cogs is beautiful. Cogs has style. Cogs will put your mental powers to the ultimate test, and best of all the HD remastered version for the iPad has all of the original iPhone levels plus the downloadable level packs all included in the main game. Remember those slider puzzles you used to get in your cereal boxes back in the 70's and 80's – usually a 3x3 or 4x4 grid of squares with one square missing and you had to slide the pieces around to make a picture or put numbers in order or solve something. It was the precursor to Rubik's Cube.