I adore the cozy vibe from the graphics, mood lighting, and music! Easy full marks for me there. Aside from a pretty hilarious bug where you can keep hitting complete order and then when you press back tons of customers come and go as if you completed their orders too, it actually worked quite well.
I would have liked to be able to skip/progress the dialog a little faster, sometimes I was just waiting for the customer to arrive, or finish a line too long. Skipping the typewriting sequence was nice, but being able to get the order to come out/the next line to come quicker would have been great.
Lastly, some of the things you need to do were just a little hidden; for instance, it took me a minute to find how to actually add tea to the cup because I assumed the tea wasn't in the "cakes" section.
Overall very pleasing to the eyes, ears, heart, and soul, and quite playable in browser.
Great work! :)