Core idea: you do not choose a list, you win one. Pull the lever and three reels (verdict, mood, subject) land on a list. Hold a reel to steer your luck: hold "Worst" and every pull is a complaint. Nudge steps through every list in order, so nothing is ever out of reach.
Length: the payout is a paytable in three tiers. Ranks 1 to 3 are the jackpot, with art and a full blurb. 4 to 10 are big wins. Everything past 10 is small change, set dense. A 3 item list is all jackpot; the 100 books are mostly small change, and the coin tray shows you which you got before you read a word.
Homes for rich content: jackpot cards hold a large photo and link; the third reel holds each list's icon; small change items are links; the cabinet sign and reel strips are where illustration goes.
Hardest to build: real reel strips that decelerate and land convincingly on a chosen result, with sound, while staying honest for screen readers and reduced motion. Also deciding what "hold" means once there are six moods and forty lists.