Fun game. Something very satisfying and relaxing about being able to play a puzzle game by just 'lazily' clicking both mouse buttons. Some levels end up being very satisfying, others are more trial & error and a bit of messing about to get it right. I think that's just one downside of the concept: you can see the solution, plan for it, and still mess it up and have to retry and fiddle around until you get it exactly right, because you just barely over- or underclicked it. For the most part though, the levels felt smooth and intuitive enough. The graphics aren't particularly exciting, but they're clear enough and I understood how to play it pretty quickly. The music's also a great choice. Great game to expand upon with new obstacles (and as another commenter suggested, a new block, or perhaps something that extra reverses the gravity of the existing blocks?) but beware that the difficulty of a level is largely in the puzzle, and not purely in the fiddling about with having to click exactly perfectly.