Fantastic! Thank you for making this game!
A couple thoughts:
- It would be nice if you didn't have to undo movements that didn't do anything - e.g. if nothing is YOU and you press arrows for 5 turns before undoing, it takes 6 undoes to get back in action
- some inconsistent sprite layers: in the level where GRASS is stop, the FLAG sprite appears above half the walls and below the other half
- Is it intentional that, when you stack several YOUs into a square, if you walk them into a KILL only one dies?
EDIT: for reference, I was playing the not-jam version