I like the style. I appreciate that the game has some sort of story to it, which I think is rare in game jams.
The idea of rewinding isn't used in the game-play, which I would have liked. It's just resetting the level when you did something wrong: basically all games have that. But the theme works because it's a part of the story (characters know Kevin can rewind time). I was expecting and hoping for a mechanic where you get stuff from future hours and have to go back in time to do stuff. It would be more of a puzzle that way. For example, the cake could appear at the last hour. Then you go back in time to the 2nd hour where the guard says he likes cake and that's when he lets you out. You could also do something like that with the cauldron. In a future level a scientist explains why it's relevant, so you can go back and interact with it.