I like the game. It is fun to play and to think of ways to solve the levels. I only have two ideas to make it better:
1. In level 5, the physics jets janky when stacking too many characters or corpses. Maybe look into that a bit.
2. The jumping physics require tight precision some times, especially when jumping off the side of an object. Maybe look at this game, especially the part about assists: https://gmtk.itch.io/platformer-toolkit