It required me 116 deaths but I completed the game. The concept it's really simple, but it works very well. The music is also pretty nice. The only complain is that the jump feels a bit too float, but making it heavier might also make the game arder so I don't know if you should really change it. Also in some levels you can slip through the water wheels and skip part of the level, I don't know if that was done on purpose or not, but given that it's part puzzle game you could keep it as alternative solutions
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When I was testing the game, I saw the slip exploits and thought that if the player could discover it, then I wouldn't mind if they used it ya know? 116 deaths btw is very impressive, I think my first tester took about 50 more deaths till he finished. With the jump, I realized after playing your game that mine felt really floaty, and it makes me want to experiment with a gravity level that feels just right.