Rather unoriginal concept, good execution
Admittedly, physics-based puzzles are nothing new. Although the idea of being unable to move your characters is new, to the best of my knowledge, there are really very few original ideas in "The Fall".
Despite this, I actually found the game itself entertaining. The puzzles are well-designed and quickly get rather intricate. Many of them had me scratching my head- some of which seemed obvious once I finally figured it out. That said, it gets pretty old after a few levels, and the music is repetitive and annoying.