I love the idea!
I'd say it's only missing some QOL which is obviously not something expected in a game jam, but I thought it's worth mentioning. The main qol thing I'd say would love is to have the option to also completely remove the ghost of his past since sometimes he fucks me over.
What I didn't like is the time the copy stays frozen, I tried a lot to reach the charactert o jump over spikes, when I jumped over, it seems there's a timer for my jump to be able initiate again, and by that time, the copy would be dead anyway, so that is mostly what ruined it for me.
Good luck with the jam man! Hope to be able to be as creative as you someday!