Cohesion - Stick Together The great new "sticky" puzzle from NeatWits Cohesion - The great new "sticky" puzzle from NeatWits Cohesion is a brand new "sticky" puzzle based on the classic "15 Puzzle", sometimes known as "slide the square", however Cohesion differs in one important way... The squares in Cohesion are various colours. If two squares the same colour touch sides, they bond together. The bond is permanent, and the new shape it creates adds to the unique challenge of Cohesion. The puzzle is solved when all the squares of each colour have combined. This free version of Cohesion has the following features: - Ad Funded- 210 Puzzles- Portrait mode The add free paid version has 240 puzzles, allows screen rotation, and has a convenient reset button to reset the puzzle if you get stuck.