Hi, thanks for commenting and bringing your ideas in.
About plot I am not sure if I want two different dimensions.
In my mind it was more that either the main character is some kind of demi-god and can simply change form, or that it's some sort of curse, but still one person just with two forms and all in one dimension. But yeah... maybe it could also work with the concept of switching between two different dimensions. I will think about it...
With "walkthrough", you mean like some kind of "auto-play" or just some "hints" in the menu?