It's interesting! I think the ability to affect objects by attacking their past self is very innovative and would like to see more different items to interact with. But I found it to be a bit unintuitive at first. It's kind of hard to see when you hit or didn't hit the time ghost, so when you don't understand the game it's kind of hard to understand what the effects of hitting the ghosts are. I would add some visual effects to the affected objects to indicate that the player has interacted with their ghosts!
Good job!