A nice game, but boy oh boy, do I not like those sounds... (So good job!)
Getting to the end in the last stage was quite tough, but I liked the challenge!
(I half in half expected to be executed right before I got the trophy XD)
Very well done for your first, game jam, so please just take the following comment as constructive feedback!
(I am bad at making my criticizing feedback not sound mean)
I felt that the controls are a bit difficult to control, personally I would have adjust them to be more snappy.
This would make precision platforming easier, which in turn enables you to create harder platforming challenges.
I assume you are just starting game development, and good movement is a very difficult thing to achieve, however I would advise you to check out "Platformer toolkit" if you haven't already. As it gives an opportunity to play with how you want your controls to feel. (https://gmtk.itch.io/platformer-toolkit)