A very cool experiment! For me, though, the musical additions were just not enough to say this is an "improvement" on the film, but it definitely is a fun alternate way to watch!
Personally I love the original Noir movie as is, so I was interested in what this brought to the table. Overall the music worked, but sometimes there were pieces of music that felt a bit off in my opinion. Sometimes the lyrics tell a similar story to what is going on in the movie when they eventually start, but sometimes the intro beats seemed too "happy" for the moment. Also, the normal sound effects are removed in place of the music, and that felt a little jarring too sometimes.
Otherwise, technical edits were solid, I did not notice anything but the musical additions. Great work otherwise!