I love it! A very nice puzzle mechanic, I really had some Eureka-moments during playing!
Music is also very chill, but the last level definitely is not ;D I found the platformer challenges close to being frustrating, but I usually don't play platformers, so this could just be me. Maybe you could add some coyote-time or decrease the space between the platforms... but eventually I did it, so I can't complain too much lol.
All in all a very nice game, that you could build upon after the jam! I think it has a lot potential!