Charming all around - reminds me of my last jam game :) That said, there do seem to be some issues with customer AI - a customer will come in, I see the item they want, I stock it, they still don't find it, and they break stuff :/
Also had this issue w the worm guys, if you pick it up/buy it and bring it to them, the interact is 'give item to customer' and theyll then go to the counter to purchase!