Hi, i really liked the concept of the game, it is very interesting and you have a lot of possibilities to explore.
If you plan to keep updating this game i'd suggest to put a time limit for the time back (eg: after 5seconds clicked, the time rewind cancels)
I liked the level design as well, the objectives are pretty clear and i knew where to go and what to do even without a tutorial
About the aesthetics and sounds, considering its a jam game, i can't really complain on that, even tho the clean design fits the game well.
As someone said, understanding how the time rewind works isnt instinctive without some kind of explaination, even a text on the walls would have done the trick i think
Overall i enjoyed your game and really appreciated the mechanics, good job!