Reversing objects was quite fun, and encourages you to try different solutions:
For example, I thought I had a clever solution for level 8, where I thought I could remove the guard by forcibly altering the guard's patrol path by placing boxes in his way and guiding him into the lasers. Sadly, lasers are only lethal to the player. I also tried to trap him behind said lasers, but that caused a fatal error with the guard's path finding.
The solution to the first puzzle was clever, but felt under-used in later puzzles. The art style was good, and the music was fitting, though a little grating at times.
An enjoyable puzzle game whose main mechanic really inspires experimentation and shenanigans.