Thanks for the reply!
Just to respond to a few things:
Most of my rar files were in my desktop and download folders and there were none. I can check again here, but I eventually collected hundreds of keys and never came across a single chest. I'm not sure if this is just a bug or something. But I will double check when I get the chance.
About the key, I feel like if there was a better way to find the totems, then maybe you could place the key in a completely random folder, and after finally knocking out the 4th totem, you can have something in-game give you the location of the key. Or at least maybe if you kill each boss, you get a segment of the file path to look for, and once you beat all 4, you can go to that location. Which means you could still randomly stumble upon it. I just figured going to my adventurOS folder was something I had to try, and personally would have liked to have gone through and fought all the bosses first prior to obtaining that key (which as I see others say it was purchasable, I don't think that should be a thing either). I just think something other than the boss key in that folder would be interesting, and that something that literally unlocks progression shouldn't be rushed. Games that give pathways to the end goal right away generally leave it up to the player to find a reason to play and I think a lot of people want to be given something they can work with and play within the boundaries of. Personally, if I knew there was an option to go fight the end boss without doing anything else, if I decide "lets go fight the other bosses instead" its just basically being a tourist. There's no real point in going to the other bosses if killing them doesn't offer actual progression. I don't know if this makes sense, it's somewhat hard to describe.
Also thanks again for your guys' excellent work. I know you guys consider and respond to the feedback here and that is really awesome and I have really high hopes for you guys and this game.