I am really impressed with the sheer amount of content here!
First of all, it was really fun! I liked the puzzles and found them relatively challenging. I'm also impressed with how many there were for such a short amount of game dev time. I thought that the mechanic and narrative fit the theme very well.
I also really loved the art - the animation was really fun and quirky. I do think that if you continued to work on it, some polish could be really nice. I noticed someone else mention how it would be nice to see some kind of effect where the enemy/item being rewound through time would be highlighted - I second that!
Overall, I really enjoyed it and could see a really nice product coming out of it if you just spent even another week or so on it! Really great job! :D