The introduction is awesome, the music was awesome and you nailed the detective aspect. As for the game itself it's well done.
As said by another comment it would have been nice to have a mission structure because at the end you end up wandering around without a clear puprose.
I liked the art in the game but sometimes it wasn't consistent and some elements felt too different from each other.
The game mechanic is fun and the projectiles are satisfying. I liked also the fact that you put different description to the items, it makes the game more immersive.
I think you nailed the theme.
Nice job!