This is indeed a different game from most of the games in jam. Great work on models, textures/shaders and voice acting, I loved level transition animation too (would be amazing for a 3D space shooter :D)
As for the story, combining rewind with a murder story was a pretty unique take but since the focus of game is on story, I think there could be more depth to the story. But still great job for 4 days. This could make a great story if you work on it more.
Btw did you make the models in 4 days too?