This is very cute! I like the idea of re-vamping classic RPGs to not have a GM and instead rotate the main character around. Also the fact that is not based on a particular setting opens up a lot of playing possibilities :)
The idea of map creation is super interesting! Can't wait to have a map that is completely in comprehensive except for those that have been playing, haha. If our game has anything like your drawings I'm sure we will have fun! Also, the simplicity of it and the focus on collective play makes it perfect to play with kids, so I may do that.
However, when seeing the roles, I can't help but think that the enjoyment of the "Treasure" person has some degrees of separation from the rest of the group (as in, they are the ones that make the map, they do not really interact in battles, etc.) I may actually hack it to be a third person game in which we all take the role of Treasure when it is needed, to see if that sounds better. Oh, relatedly, I really your "healstuff" example -- a chewy ring that heals you up is so cool!
A thing I don't really like is the EXP mechanic. I understand why it is there (this is based on classic RPGs after all) but I felt as if your game was more conductive to have a "milestone" advancement system, you know?
Regardless, I really liked reading through it. Thank you for sharing!