Interesting concept and great puzzle design! The levels were really challenging and I had a really hard time going through those puzzles, and I got stuck at one level, so I could not play all levels. But I liked all those levels I did play! I could not quite get how the position of the gravestones change the controls at first.
One suggestion I have is to change the sfx for when the gravestone moves, it is somewhat annoying and loud
Overall an amazing entry to the jam! Great job!