Are there any cheat codes or stat cheats?
There's the cheat toggle found in the menu (unlimited food, can continue after bad ends, encounter menu).
Otherwise cheating has to be done with editing the save file, which is quite easy since it's .json which is a "human friendly interface", ctrl+f is your friend there, always make a backup (although the game usually makes them for you nowadays) before making edits, if you do not know what to do, better not do it or you get a visit from a certain character, but just ctrl+f phrases like money, food, perkPoints, skillPoints, magicPoints (you can buy spells or upgrade your gear with these).
There's tons of other stuff you can do with save editing, if you know how, i've found out mostly by tinkering with it myself and since only requirement of understanding it is pretty much knowing english and understanding a little about how the variables work, my understanding level of coding is the level of potato and even i can do it.