Sorry to hear it burned ya out; glad to hear that it's still simmering in the back of your mind. If it's any encouragement, the idea has staying power: I was sitting here wondering, "Hey, where's that Resident Evil RPG I saw on Itch a while back? I wanna pick it up."
But, I can definitely resonate with the weight that bears down on ya when a project looms large, loses its luster, and begins to seem like an obligation. Best o' luck beating the burnout; creative endeavors in the public space are an act of audacity--a bold move than any passersby might comment on (for good or for ill).
This seems like a cool project; I look forward to giving it a read.