What's great about this puzzle game is that the solutions are very satisfying. Whenever you complete a puzzle, you ask yourself why you didn't think of it sooner because the answer is almost always intuitive.

The introduction of new mechanics also has a very good pacing to it. It does not feel like a slog a lot of times because they don't overuse the mechanics over numerous puzzles. Each puzzle makes you think differently about how the pieces interact. Rarely do puzzles feel like they're just a rehash of previous puzzles.

Also the author doesn't treat you like you're stupid. It has a very minimalist approach so a lot of the learning is left on your own. Every puzzle piece has a purpose or narrows your choices for you so you can't reuse solutions. The rules feel very fair once you learned how it works. Some mechanics do feel somewhat obscure at first and makes you say, how am I supposed to know that. But after a few tries, they do feel intuitive.

For the average person(like me), it's very hard and you're supposed to get stuck a lot of times. What makes it better is you almost always have a choice of puzzles to go to. You can do a few puzzles in one area then proceed to another. You don't get stuck at a bottleneck at all.

The only negative thing I have to say about it is that the camera angles and the colors make some of the puzzles intentionally harder than it should be. Sometimes it makes it so you can't judge distances. Also the colors can hide obstacles and blocks. This is the only time I felt cheated because some puzzles are way easier but the visual design obscures your judgement.

I can't really fault the colors that much because the art and design is superb. The mood / background music is also very zen.