This is a very good game indeed. The mechanics are original and the levels exploit the mechanics to their limits. The puzzles are extremely well crafted: the solutions are usually elegant and fast, but sometimes very hard to find! This game is much more approachable than The Sequence games. It is less abstract and the puzzles are easier (although not easy). Some of the puzzles towards the end are quite hard, but they are never unfair. I always felt like there was something more to tweak or another direction to explore. No filler, no time wasting, amazing value for money. If you like solid puzzlers, this is a must.