Thank you very much!
As for your request, that would be a great idea! I wanted to do something like that but due to the way the ghosts were coded it would have been pretty difficult and long to implement, and I was already getting pretty short on time, so for this version, players need to remember when they shot in the past.
I do plan on making a small update after the jam to incorporate the feedback I've gotten, and this is definitely something I will add, thank you!