I haven't played many time rewinding puzzle games but I think this was a solid one. Early levels showed how mechanics worked and it all led to that final puzzle. Took me a few tries and I didn't realize that seeing the "chrono module" (that's what I'm assuming was what was at the end of each level that Kronii had to get to) with a "past" Kronii would cause a paradox.
Now, there was a mechanic that, at first, I thought was a bit annoying but in hindsight, I think it worked for the better. That is to say, having that "fog (of war)" like effect and having to explore a room once to see it fully was, in the end, beneficial. The reason why I thought it was annoying at first was that my first feeling was just that I wanted to see the entire room (and thus, puzzle) from the get go...
But I do think there is merit in forcing a player to actually spend a bit more time on each room (and thus, increasing the chances that a player will actually observe what's in each room) rather than just letting them skim over the entire area and possibly miss something. That "fog" was a good way to do that.
Also, I really like the feeling of the setting. The outside being black and the hallway slowly dissolving in flames just really sells the vibe that reality is collapsing.
In the end, it was fun and I definitely would have kept going if there was more levels to go through.