Those puzzles are so solid. Since you never really "die" die, its super snappy to pick right back up once you figure out what you're supposed to do. New mechanics get introduced just in time and they're fun and intuitive. Even the platforming gets good in tandem with the puzzling, especially in Drop Dead (speaking of which I like that you named all the levels something clever).
And your artwork is awesome, too. I really love your animations on the checkpoint crosses and the slimes, plus the transitions. It all looks really good, feels good to play and is loaded with charm. I feel like you knocked it out of the park with this entry
*edit to say I really hope you get to continue and expand this with more levels and/or mechanics!