Not bad: the core mechanic of switching back and forth between corporeal and incorporeal forms to take advantage of their strengths is pretty neat, and the game quickly introduced some nice puzzles to make the most of it!
It did feel a bit clunky and unsatisfying in some respects though. It not only really overuses the mechanic of weaving down a maze and trying to avoid touching graves, but that feels like an ill-fitting and false challenge for a puzzle game. A lot of the maps just felt way too huge and maze-like, and it was awkward to search for and pull levers when you haven't even seen the doors that they are connected to yet: maybe the camera should've been zoomed-out enough so you could see everything as most puzzle games do, or the doors and exit should be at the start of the level, not the end.
For the most part, though, I still had a good time and felt like it was a good exploration of an interesting puzzle concept that could be iterated upon, which is exactly what you want from a game jam!