This file applies a change to the player jumping physics, and alters its pose accordingly if set to do so. The configuration can be applied to all player characters, to a specific character or can be RAM flag dependent.
Details and example on how to set and use the code are found all within the ASM file.
It works mostly fine. There is, however, one big issue:
Activating a ?-block kills the player with floaty physics activated. This doesn't happen on all ceillings as solid ceillings but also turn blocks won't kill the player but it's a big issue nonetheless.