Personally I found it pretty hard to be able to run away from the ghosts and be able to aim to shoot at them x_ x;; But that can totally just be a me thing!
Also maybe adding a life bar to the enemies could be a good idea since I had no idea how much i managed to hit or missed when shooting at them.
But even so, it was pretty fun! And also it was a very different idea from what I've seen so far! Great job!