Well done on your game! It just looks amazing! The art and audio really shines and it has a great vibe.
As pointed out by several below the conveyer belt seems completely bugged. My customers were eating food that wasnt there, and in general that was just quite confusing. From a design standpoint there is also nothing preventing you from just completely filling the conveyer belt with food. I played until round 12 and I think I produced food waste for the entire city of Hanoi in that time! Perhaps having the clean off spoiled food is interesting.
I also think it would have been interesting if the player has more choices. Maybe control the belt/belt speed?
Overall though well done! Congrats on finishing your game!