[OMGWTF]

kkrieger (https://www.pouet.net/prod.php?which=12036) is an impressive 3D shooter in only 96 KiloBytes. As one of their optimization techniques they recorded all code paths and discarded unused parts. At least in the first version this was why you could only use CursorDown in the menus and CursorUp did not work.

[saurik]

I can't tell if this is praise or condemnation by demonstration ;P.

[xdennis]

My guess is: praise for kkrieger for its tiny size, and condemnation by demonstration because kkrieger was known to have bugs because of the usage of that technique.

[jamesfinlayson]

kkrieger was my first thought too - I think there was some other important piece of functionality that got stripped as well (I want to say something to do with hitboxes or collision detection).