That library basement part gets me because those old records hardly ever get put online. If you found blueprints or a maker's plate down there, there are probably photos and papers about other rides in the same box. Might be worth asking the librarian what else is in that collection, since stuff like that usually gets tossed once a mall is set to be torn down.

Four rounds in 90 minutes is a pretty good clip for Spirit Island, especially your first time running it alone. Did you play as a single spirit the whole time or did you try the two-handed thing where you control two spirits at once? That's the part that always gets me with solo play, because managing one spirit feels calm but running two turns it into a whole different puzzle. I'm curious if the difficulty ramped up because of the invaders or because you started seeing how your spirit's powers could combo in ways you missed early on. The "no one texting during your turn" thing is real too, people don't talk about how much dead time gets cut when you're the only one playing. So did losing to the invaders a couple times make you want to reset and try again, or were you good after those four rounds?

Learned basic on an old TI calculator as a kid and barely used it again, but the logic stuck with me. Pick the one that keeps you building stuff, jobs change but the habit of finishing projects is what gets you hired.