Hey, thanks for playing! I can't say that Outer Wilds is something I ever expected Vacant Kingdom to be compared to, but I'll take the compliment because that's just generally one of the most impressive video games out there.
Yeah, I think when playing with mouse & keyboard, losing the mouse in all of the chaos can be a real problem.
The full game will include some areas which are only mentioned in the dialogue in Prologue, so I hope that can satisfy your curiosity about the world a bit more.
Noted about the difficulty naming convention. I guess it's a hard thing to find something that works for everyone, especially with bullet hell games being something with a pretty large range of possible player skill.
About where you got lost... the current development version does have a map feature -- so I hope that can help people understand where they may have missed something if they get stuck!
Anyways, thanks again for playing and taking the time to leave your thoughts. The full game of Vacant Kingdom is still something I'm working on every week, so please keep on eye open for it on here and Steam.