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About this game
Shelf Order is a calm constraint puzzle about putting a new cart of books away. Every level has three shelves with six slots and a cart of twelve to eighteen books. Each book has a color, a height and a genre, and every level gives you three to five rules to satisfy at the same time. A rule might keep every red book on one shelf, put all biographies on another, order a shelf from tall to short, or ask for a trilogy in volumes I II III side by side. Drag books from the cart, tap a book and then a slot, or swap two shelf books. The rules panel checks itself as you work. Undo is free, one hint glows on a misplaced book, and nothing can fail. Finish with fewer moves and less time for three stars. Your best level, stars and fewest moves are saved in the browser.
How to play
Drag a book to a shelf, or tap a book and then a slot. Swap two shelf books, meet every rule and empty the cart.
Tips & Tricks
- Tap the level number to choose any unlocked level again.
- Read all rules before the first move, then pick the shelf with the strongest profile.
- Drag a book back to the cart when a shelf feels crowded.
- Hints are unlimited and never cost a move.
Frequently asked questions
How do I know that every level can be solved?
Each of the 24 levels is stored with a finished target arrangement. The cart is shuffled from that arrangement, so a valid solution always exists. An automated check replays the stored target for all 24 levels and confirms every rule.
What happens if I place a book in the wrong spot?
Nothing bad happens. The rule row stays amber, the book stays where you put it, and you can drag it again, swap it, undo the move or restart the level. There is no timer penalty and no fail state.
