How did you decide on these particular mechanics? Have you been prototyping to arrive here? Does another game serve as inspiration? They're just very specific and you seem so confident about them!
This all came to me when I was in a very positive state while creating mockups lol. I wrote down what I was experiencing at the time:
"ever dream up a creation
you work it so fast and loose every moment is fading from within this intangible thing
it has no edges
certainly no handle
but you gotta grab it
yeah my heart pounds so fast in excitement
in mania
i have to have this creation created
short of breath with the fear of it being gone
and i mustn't let it be corrected by the solidity around us
must remain intangible and"
The choices are specific and confident because they are exactly what I want them to be for the experience I want to create. They are the emergent conclusion given years of assimilating media into my taste, so in that regard it is really difficult to point to any particular thing that serves as inspiration for this project, but if there was something serving as at least a source of my apparent confidence it would probably be David Lynch talking in interviews about how he feels about ideas.
Something that helps me to make a thing feel discreet is to be very clear about the path I expect/want the player to take. A follows B, for example. I design a lot of very tiny-open-world stuff, so it can be a bit weird and conceptual, but every little thing I can nail down without damaging the openness is a small victory for concreteness.
In regards to concreteness, I have a similar method to your expected player path.
I try to create specific moments.
Not even necessarily a crux or anything, but moments I feel are special.
I think about pretty much ALL media I create like this and I honestly don't know if it's good or bad.
I take very particular imagery like a memory or dream I can't explain, something that feels mystical to me, then I create a universe to support the existence of that imagery. I have SO much of this imagery that I've written down over the years that it is honestly overwhelming and hopefully I will get to it all eventually somehow lol.
Edit: So, in the middle of writing this yesterday I found out that I have been exposed to a person who tested positive for covid, not sure what that will mean for development, but i'm a bit stressed rn to say the least...