Reminded me of Don Hertzfeldt's short film World of Tomorrow, in that both it and Quadrilateral Cowboy present an impressive spread of concepts through understated-yet-endearing aesthetics within a brief timeframe. It invites you to imagine entire works building off its component ideas, or an extension to the length of a "full" film/game. Where World of Tomorrow would spawn sequel episodes drilling into its initial ideas rather than replicating the inventiveness of the first, Quadrilateral Cowboy yielded no offspring. Nothing overstays its welcome, it reuses no jokes, and it ends with genuine grace. Maybe it's a shame to not have more, but maybe it's better this way.