Great game! Really loved the art, music, and sound effects. Overall, awesome presentation. The level design was quite clever. It does get hard fast, though. I wish that enemies had a little animation before they did their thing (like having the jumpy slimes squish their face before they jump) so I could anticipate their movements better. Joe from Team Horsehead has elaborated on this in the comments below.
I very much enjoyed the concept of freezing time and switching between your abilities. It's a bit clunky at first, but that's to be expected with a game jam game!
With a bit more refinement, I think you've got something really special on your hands. A cute puzzle-platformer where both the puzzling and platforming are tricky. Well done and good work!