On the positive side, this is an amusing puzzle game with a coherent story and a novel mechanism. It's well-balanced - new complications are introduced gradually - and the puzzles are challenging but not impossible.
So far, so good.
On the negative side, I've experienced a number of glitches - I had to replay a level to make the controls of the next level responsive - and I'm not finding the controls intuitive. Too much side-scrolling, too much pressing on a button to find that while the mouse is inside it, it's not actually inside the responsive area, too many hints flashing by at a speed I cannot read them. Some puzzles need very precise timing to solve - you need to stop the action in the right moment, and place your block _just then_; miss it and you fail your objectives.
Overall, I like the idea – and the playthrough videos on YouTube – much better than the actual gameplay. Despite my eternal love for Tetris, I don't think I shall bother again with this.