well the default memory limit is only 2k… after around 2k characters the AI will start forgetting earlier events. You can use an AI model with more memory, some models like nemo can go up to 128k memory!
you can follow my guide https://fierylion.itch.io/formamorph/devlog/885513/quick-setup-guide-free-openrouter-setup
and give openrouter a few bucks, should be enough to play for days on a much bigger and smarter model like nemo or celeste