This might sound a bit strange, but my self-imposed challenge was to make a plot-driven game in less than 100 words, to go along with the spirit of a low-res game. I'm normally a very verbose writer, to the point that I've made bullet hells in the past with >1000 word plots, so I wanted to make something where every word counted.
(In the end, I think there was just a tad over 100 words in the game's script, though in my defense, a few of them are for instructions.)