Nicely done! This game is kinda addicting. I agree with previous comment, some hints for where to click in the beginning, or have shelves flash when a delivery is made or have the number turn green. Same with the shop, something that tells you to start there, highlighting the outline i think would be enough to get the point across. I would love to hear sounds for jobs being complete or deliveries being made, make sure to limit the amount of voices so you don't get overlapping sounds when there are a ton of workers. Just brainstorming at this point, but maybe have the workers go to a random job after delivery instead of the closest job so that there is more movement on the screen and they don't stack things on a single shelf the whole time. Also for progression maybe start with just one job table and one delivery shelf, buy more just like workers so players have more than one thing to prioritize.
Really great job on this!