After clicking through the first popups with the player's inner monologue, I fully expected some help text like "Use W S A D to move" to pop up.

I had no real reason for that expectation, except this is how several games I played in recent years handled it - which made me realize now, that explaining gameplay to new players is something that's actively evolving. There may not be a rulebook, but there are clear trends.

He did not pull it off. You can't click on things, there are no "you can't do this yet" signs if you get to the temple without a package, there is no "following your nose at the start leads to your first quest". Utterly inscrutable.