I actually really enjoyed reading this compared to what I was expecting! I noticed a couple typo like errors. The boost die in the appendix, the caption is "unmodified" even though all of the other listed dice are "modified".
I think there was an extra "of" here "...relation between of success and advantage," which is 2nd introductory paragraph, third line.
I could be wrong but I thought I'd just let you know! I'm glad you included the appendix too, In case I decide to mix up the play experience when I eventually get another game~