Wow what an interesting game! First off, I really dig the style of the game. The art and the sort of internal monologue between levels is really cool. I think the game could have used more of a tutorial or something to ease the player in, though. I played through the game twice because after I finished the first time I still hadn't figured out how the ghost interactions worked (and I wondered if I could have done something else to get a different ending!)
This feels like a big game that's delivered in a small package. Understandably that's the challenge of a game jam, you can't really make something big. I didn't get to experience as much of the story as I wanted to, and there were quite a bit of UI elements that I didn't understand what they meant even after the second playthrough. I think given an opportunity to present more of the story and how the whole time control and ghost controlling aspects work, you could produce the bigger game which is currently hiding inside our 9-day time limit.
Overall great job, hope to see you at the next one!