Advice for game developers from a book by William Hogarth:

Of Intricacy.

...Pursuing is the business of our lives; and even abstracted from any other view, gives pleasure. Every arising difficulty, that for a while attends and interrupts the pursuit, gives a sort of spring to the mind, enhances the pleasure, and makes what would else be toil and labour, become sport and recreation."

"Wherein would consist the joys of hunting, shooting, fishing, and many other favourite diversions, without the frequent turns and difficulties, and disappointments, that are daily met with in the pursuit?—how joyless does the sportsman return when the hare has not had fair play?

From: http://www.gutenberg.org/files/51459/51459-h/51459-h.htm#CHAPTER_V

There are "turns and difficulties" in MOURNING, a spawn of LD46, though it usually takes <10 minutes to play:

Play it here (HTML): http://www.pub22.net/mourning/

Credits:

Sounds:

Stek59 https://freesound.org/people/dimbark1/sounds/316797/ Bradovic https://freesound.org/people/Bradovic/sounds/171992/ dimbark1 https://freesound.org/people/dimbark1/sounds/316797/ camel7695 https://freesound.org/people/camel7695/sounds/437475/

Images:

Seline: Graphic Design: A Library of Old and New Masters in the Graphic Arts p. 133 (https://catalog.hathitrust.org/Record/009078797)

Baskets: A Study of the Textile Art in its Relation to the Development of Form and Ornament (http://www.gutenberg.org/files/17730/17730-h/17730-h.htm)

Stone walls: Architecture Classic and Early Christian (http://www.gutenberg.org/files/29759/29759-h/29759-h.htm)

West Castle: Pagan and Christian Rome p. 187 (http://www.gutenberg.org/files/22153/22153-h/22153-h.htm)

Egyptian Elements: History of Architecture p. 12 (http://www.gutenberg.org/files/26319/26319-h/arch1.html), The New Gresham Encyclopedia Volume 4, Part 2 (http://www.gutenberg.org/files/35844/35844-h/35844-h.htm)