I absolutely loved this one! I actually sat down and played through the whole game, which I very rarely do for game jam submissions :)
First of all, genuinely hilarious. I am so impressed with the amount of easter eggs and jokes you managed to add in to the newspapers and whatnot scattered around. The intro was also really well-written and totally set the mood for the rest of the game. I do think that if you continued to work on it, you should make the intro a necessary part of viewing before playing - maybe as a cutscene animation or something like that? The art is really really cute, so I'd love to see more!
Secondly, the game itself was very fun! The gameplay was actually somewhat challenging and there was some strategy necessary. I think if you made it even more challenging by decreasing the detective's health (maybe having it become a bullet hell type of game?) it could be even cooler. I also loved the variety of weapons to choose from - the trumpet is my personal weapon of choice :)
Seriously, this was really fun and well-made for a game jam game! I would love to see you continue to work on it afterwards!