This is really impressively detailed! And it's very evocative of the style of game you have in mind -- I had a clear visual of what this game looks like in my head throughout. At first I was a bit confused by the "Characters" section being before any of the game mechanics, but looking back, it helped set the tone in a way that made everything else easier to imagine, and you kept that tone consistent throughout.
I will say I found this pretty dry to read. I've been grading these entries both on how well they capture the feeling of a walkthrough and on how well it reads as a standalone piece of writing, and while this is really strong in the former category it kind of dragged in the latter, especially with the exhaustively detailed descriptions of stages.
That said, one thing I really liked about the descriptions of stages was the theme of an upper and lower path in each level -- it was nice to have some repeated structure.