To me, gamelike user interface would be simply editorialized, while gamified user interface would be poorly editoralized. One is editoralized with an opinion, the other also has an error. It isn't a fact that it's gamelike over all, nor is it how it's described in the README - the author says "with a game inspired menu system" which is a far cry from game-esque, game-like, game-ified, etc.
"Poorly described" would be correct. "Editorialized" does not mean what you think it means. See my previous comment.