I think it's more the number of interactions than between the spirits and the locations on the islands, plus the boons. The game jam's criteria for "easy to use on the fly" is probably a little unfair to an adventure like yours that's got so much going on with it, but that judgement was how I felt after giving it a first read-through. (Which is how I'm trying to consistently judge everyone's entry.) My own entry probably doesn't do any better on that point. I would certainly be interested in seeing your commercial release of Seven Sealed Spirits when its ready.