Very cute game! It was hard to tell who's running and who's just coming in, and I think I killed a lot of people that hadn't eaten yet.
One thing I found a bit hard was how slippery your character feels, and you overshoot the food/table. If you had smaller restaurants and slowly expanded for people to get used to the mechanic it might be a good ramp up :)
If you're developing more, some different dishes that have different perks might be fun and challenging!