I really like the art style aswell as the atmosphere you created and the funny dialogues, like the rat one it cracked me up!
If I had to give some advice I would maybe say that it feels a bit redundant especially when you have found about 4-5 customers and are looking for the last one to see the interaction and the dialogues he has, but it's understandable since you probably had to draw everything or almost everything by yourself.
Great work overall! :)