What a great solo rpg. Could easily become my next hyperfocus. A character lost within a strange castle, questing to recover their memories while hopefully surviving, is a great premise. 

The prompts are open enough to allow for a decent amount of narrative control while still providing guidance, although the vagaries of dice rolls did lead to a smidge of frustration while exploring areas of the castle, the first time I played. I ended up house ruling that part to expedite matters somewhat.