Wow. This game feels so polished. I just can't believe you've done something like this in such a short space of time. The animations are superb, and I love the parallax effect on the backgrounds. The concept fits perfectly with the theme, and the concepts of the game are really well explored.
My suggestions are more just small quality-of-life improvements. While the "9 lives" idea is funny at first, it's not so fun when you have to start at the very beginning, going through all the tutorial stages again. Especially when a couple of deaths feel quite cheap, and the overall difficulty spikes nearer the end.
I would love just a couple more keyboard bindings as well. Have two keys to the slow/moving time would be good, and possibly a key to reset the time of all the objects.
This isn't really game related, but a slightly higher-resolution thumbnail might help the game stand out better. This was one of the last games I got to, and I think it's because the thumbnail blurred in with the rest.
On the whole though, I'm in awe of just how much you've managed to do in a short space of time. This is truly one of the best games in the jam.