I loved this entry! Is incredibly satisfying to see the little goblins run back and forth to deliver packages, and then hire someone to make them run faster. The idea is funny, the gameplay works smoothly, and the game overall is really good.
As someone else was saying in the comments, the possibility to buy a conveyor belt adds an unexpected layer of strategy to the whole experience.
Some UI elements are less refined than others (e.g. the buttons are always enabled, even if I don't have the money to buy the item), but the overall product is amazing for a three-days game jam! Great job, congrats! :)
Edit: I almost forgot! My record is 7.28 :P