I really like your snapshot idea, it is a lot more natural and fitting than any of my suggestions, kudos! The finding places by description is also a good idea, but you would need to have very unique, descriptive areas for that but it seems like you're planning on that anyways. I think if you lean into the snapshot / memory / notes mechanic it'll definitely help the game find its own niche.
I think adding some sort of reward for killing enemies is a good idea, I was going to mention it but just forgot.
And nice, glad that you are helping out the games with no ratings, I've been doing the same! I look forward to following the development of your game after the jam