Ok, I am going to write a lot, but it only because I enjoyed your game so much. 1. The map design is quite polished. The assests look truly great. I am keeping that in mind, because it being so polished only helps to notice the small immersion breaking scenery changes. 2. The fact that you have to reveserse time when the clock reaches 10 is a twist on the time reversal mechanic which is appropriate with the 10 second theme. 3. The game looks really good, but the dialogue is a bit skeletal, and it stands out. It would greatly improve the experience if you get some more background story until you reach the time reversal mechanic, or have the main charachters say some more interesting things. I would not be writing this if the game didn't look so good. 4. The puzzles are cool. In fact, some of them are very cool, it is clear that they required some thought to construct, but not everything is appropriately communicated to the player. Sure, I noticed that when the time is reversed the pool's surface becomes solid, and so solved the puzzle, but: i) I could have just as well not noticed it, and while the information is there, it would lead to unnecassary fraustration. The idea that some mechanics are not clear does not fit the overall design of the game IMO. ii) Why would the pool change with the time reversal mechanic? This is not explained in the game. Another issue is one which comes naturally with the time reversal mechanic being forced at 10 sec. It is possible to be soft-locked out of some puzzles. For instance, I got soft-locked in the puzzle immediately after the pool. While it is possible to (rather) quickly nevigate between levels, I had to go through the pool again, which is unnecassary.
Overall great game, I encourege you to work on it more. Capping the time reversal is an interesting mechanic, it might be possible to construct some very interesting puzzles with this cap. Polish the map some more, enhance the writing, and you have a small steam game:)