Honestly you have a really great idea here. I wish parts of it were explained better (I.e. where the things I buy go to, that ending the day early means you're literally shutting down the whole day without money). A random generator for little facts about the heroes could be fun too. Develop a little attachment. I also am unclear whether the items for various slots are just ranked by their tier or if they have differences. The magic greatsword and axe have wildly different prices besides being in the same tier, but on the adventurer list, it's just listed by the item's tier. Anyways, it's a good idea. You should definitely expand on it.