This is fantastic, I loved it! I created something very similar to this game a few jams ago myself so I appreciate the thought that went into making the arm turn and pick up stuff. I originally had remade all the mechanics of surgeon simulator with the fingers but that turned into a physics nightmare with each finger so I'm glad you also took the easier approach as well. I couldn't figure out how to actually stamp the papers, so I just resorted to smashing stuff around on the desk and watching things fly, it was very satisfying. Playing in the browser doesn't have sound so I downloaded it and it worked just fine. If you want to check out my previous jam game that was similar to yours you can see that here: https://kokutouchichi.itch.io/boocake-cafe
That wasn't my entry for this jam though, for this jam it should appear below this message.
Fun game!