It's a shame there was a problem with the submitted version, because this is quite a good game! The concept of using your dead bodies as platforming blocks has been done a decent bit in recent times, but this game's inclusion of Jump King-esque platforming mechanics makes the idea feel more interesting to interact with. I also really appreciate the sound effect for charging the jump, it helps to gauge how long you've charged it for and eliminates some of the guesswork.
There are quite a few levels, with some fun ideas amongst them. I really like the concept of dying and possessing a slime in another inaccessible part of the level to progress, I think expanding on that could make for some pretty interesting puzzles.
A fun and enjoyable time overall, good job!