Unmechanical, a beautiful 3D puzzle game, has just gone free for a limited time. This is the first time this game has ever been free. It’s part of a new bundle of 26 paid apps Amazon is giving away, of which 4 apps are compatible with the Fire TV. Unmechanical features over 30 unique puzzles covering logic, physics, and memory oriented challenges. The game is only compatible with the Fire TV, but does work with either a game controller or remote.