Cool this is a very funny and cool idea for a game. I really liked the art and the chill music which fits the atmosphere very well. Your idea for the "loads" are also very funny: Sausages, burgers, etc... I also liked that there are ingredients which make the drinks worse. This adds an extra layer to it.
Not sure if it was on purpose to make it feel a bit drunk, but moving the glass did not feel very responsive. Therefore it was sometimes quite hard to catch the things. I also experienced a few bugs. Some "loads" were just stuck in the air for the remainder of the game. When you place the glass before the customer is there it is picked up by the person before they are at the place. I would change that, so that the glass only is picked up when the person is sitting at the spot.
Congratulations to this very cool game! Well done.