Well done on finishing your game! I really like the unique take on the theme with the slowing down mechanic.
A couple areas it could be improved upon is by having a tutorial and by maybe making the goal clear in the level. I found that I didn't really know what I should be doing. Also there were a few bugs but I'm sure that could easily be fixed with a little more time.
Although I like the overall vision, I think that the scope of this project was a little too big for a week so maybe in the next game jam project you partake in, try to go for something a little smaller or simpler.
I hope I wasn't too critical there. I just hope that it will help with the next project. Keep up the good work!