I really like Overcooked (even if it made me argue with my gf so many time lol) and this game give me the same vibes!
There is a couple of thing I may suggest. I was very confused on what to do at first. There's no tutorial, but that's not the problem. The game lacks some important UI, like a baloon on the customer you did not take the order or an icon that make you naturally guess that you have to press repeatedly for chopping. These are small things, but help a lot.
The pixel art you made is very cute. In my opinion you just overdo with outlines. Outline help to make things stand out, like player characters. But if evrything has an outline nothing stands out. Maybe this is more a matter a personal taste, but I like it more without it, for example the outside of the Hot Mama's is really on point!
On the design part I think you are on the right track! I really liked the concept and how you interpreted the theme!