It's a very simple concept but executed pretty well.
I did have a recurring bug where customers would leave if I wasn't fast enough, and then the next customer would pop for a half second and leave instantly, which was a little weird.
Other than that, great job! I think it would be quite good with a little more polish, and perhaps more coherent visuals (the emojis and the pictures felt like they didn't really belong with the cute art style and should have been like actual items on the counter, but I understand you probably didn't have time to concentrate on that)
Thanks for sharing