This was very nostalgic to me as it reminded me of all the flash games I played back as a kid. I really liked this, there's lot of gameplay mechanics and overall it looks very polished. I would just suggest to add more time for the customers, because it is not that easy to immediately find the right color, which is my second issue that some of the colors look very similar and it can be a bit confusing, but I understand it brings some challenge to it. Maybe there could be like a "queue" of user inputs, so that I don't have to wait for the guy to pick up the item to be able to click again. The game just needs a bit of tweaking to make it balanced, but overall it is great!