Thanks a lot for the feedback!
I went through a couple of iterations to make the box mechanic feel more intuitive, and present it a lot sooner when not needed yet (even the main menu) to get used to it, after some friends tested it, and saw that it was almost the hardest thing to do, when it should be solving the puzzles.
I keep it like it is now because it allows to create some interesting puzzles tho, with the momentum you can generate, and once used to the mechanic, you can do some pretty interesting stuff I didn’t even think of when designing the mechanic, it sure was fun to come up with original puzzles!