I liked the presentation and overall gameplay. The movement, picking up and placing objects felt fluid. The idea is very good and the interpretation is also great. The game can be expanded to a bigger scale as well.
The game should be slowed down quite a bit. I had decision paralysis quite often. interpreting the wishes, finding the objects and combining them is quite a lot of mental gymnastics. There should be at least 5 minutes per customer. I would like more time to find the creative combinations. I think you should maybe drop the customers leaving part all together and have a full timer before closing. Maybe managing the shop after closing to get more familiar with the products etc. It would be less stressful.
It has a charm to it and I think after balancing it out, it could be a real product as well. I would recommend to keep working on it. Good job!