Such a nice platformer game!
First of all, I want to say that considering the game jam restrictions, the game was pretty geometric, and I liked that you have enhanced the looks of your game with post-processing. Overall, the game was pretty polished looks-wise!
The only problem I had with the game was character controls. Although creating a platformer looks easy, it requires a lot of polishing work concerning the character movement. I suggest you look for the terms "coyote time" and "jump buffering" on the internet so you can enhance the character controller of this or your future games of yours!
Apart from those, I should say that the music is pretty great and I enjoyed it. I'm glad that you have not skipped the audio part of the game!
Good entry!