Well i get the concept its very nice but the way the mechanics are introduced is just hard, i cleared level 3 by some sort of fluke. which didnt feel like solving a puzzle or grasping a mechanic yk. this idea is very unique tho i'll give u that and the presentation was also on point.
the physics felt inconsistent. to mitigate that i think you should change the jumplet into a jelly on left click instead of water. cause the water particles fly everywhere and are very tough to predict. whereas if the jumplet transformed into a jelly. it can generate momentum more consistently as compared to the water particles. thats about it for the feedback from my side
i made a puzzle platformer as well you can check it out if u want https://itch.io/jam/brainless-game-jam/rate/4775182