Congratulations on finishing your first game jam! Your concept is excellent, and the musics fits a lot with it! But I need to say the gameplay needs some improvements, like camera and player movement, also I don't know why you need to press shift together with jump to make it higher... if you want a tip, try searching up about platformer movement on YouTube, there's a ton of tricks to make it smooth!
Other than that, congrats! You did a nice work :)