This is taking me back to the Professor Layton games, which are near and dear to me (edit: just realized someone else said this too! So you know there's something to it). It makes me want to sit down on a rainy day and solve a puzzle of a noir city. The accordion bandoneon sounds great! And I agree with Aran that some reverb could probably help the different parts sit together in the same space.
The jingles are probably my favorite part of all this. They're super creative and something that makes the soundtrack feel very complete, like now it just needs a game, which I would love to play. Nice job!