It would be nice if there were 'Special' customers. Maybe something like, if they're happy with the food, they give you decorations/clothes or more tips or something.
You can cost Papa thousands of dollars of wasted ingredients and free popcorn for a simple hotdog and ketchup order or serve uncooked sausages in paper and you will still have a job by the end of the week. You won't get a salary raise nor tips, but you will have a job!
needs a crafting mastery- items should be crafted faster depending on the number build (i.e. when you build 20 iron knives the time cost to build is reduced by 5% then when you build 30 iron knives another 5% is reduce on the time cost. max of 25% time reduced)or could be as an upgrade (i.e work table and tool box gives you bonuses, level 1 items are build 5% faster then level 2 items are build 3% faster etc.)
Note that saving up and buying a later upgrade does NOT save you money, and in fact buying a previous upgrade lowers the price of the later one, so the money you spend is the same. Thanks for doing that.
There doesn't appear to be any penalty for your Hero's losing the monster duel on a level, but you do get to keep the gold, equip slots, and storage space. So if you run through the first or second level once or twice selling everything, you quickly have enough gold to max out slots and space.