Seems like you took it from the jam page "A mechanical interpretation could be every time you die, your past self becomes an obstacle or enemy for you to face", which is fine! I wanted to see that one being done.
One thing I will say is that it's probably better to move the character towards the mouse position rather than jumping straight to it. This would prevent cheating, but more importantly, my character wouldn't get stuck on walls (which was a little frustrating).
Maybe prevent people from standing in one place, too?
Nice use of the limitation! Had fun playing.