Riley Rethal's "Best Day Ever!" is a game that sells you the fantasy of Phineas and Ferb. It's quite clever and compact, even emulating the B-plot.
"(Charlie Loves) The Spring & The Fall" is a game about a cat. It's one of the only games that's ever made me cry.
--Paul Czege's "Bacchanal" is a very horny Game Chef game that uses a lot of dice.
--E.E. Coli's "Fatimah's Busy Day" is maybe the densest 200-word game I can think of, even though it's elegant and very easy to read.