Well, it's a shop game and it works, so you have the going for you, now with the problems:
1) Haggle system is completely broken, you can pretty much get anything you want with 0 golds, therefore you'll just keep getting profits for free, and another thing is that why would you willing haggle with a customer, which would reduces the money you earn? Why is that even an option?
2) There's quite a few game breaking bugs atm, I broke the game on my second run by haggling below 0 G, which drops the number to NaN, and I bought the item which just turn my gold amount to NaN.
3) The status text about who's entering the shop will sometimes get overlay over one and other
4) Movement speed are a bit too slow for my taste
Overall I think its fine? I think for a shop game it got all the basics right, but I think it still need a bit of work and some special mechanic to stand out.