I didn't realize I needed an analog tamagotchi until now. I love this idea, and the art and layout are outstanding. I'm a little confused by the brain fog -- what dictactes the starting amount? ANd do you keep track of it with tokens on the brain? Maybe I'm missing that, but I read the rules a couple times and can't seem to find references to how it spawns, only how to reduce it.
Brain Fog starts at zero and permanently increases by one every day. Which means you have more and more fog to clear with each passing day, increasing the difficulty as time goes on. When your brain dies, you can just look at its final brain fog amount to see how many days you kept your brain alive.