Windosill is a 2009 puzzle video game by Vectorpark for Microsoft Windows, OS X, Linux, web browsers, and iOS.

The game was first released for Windows, OS X, and web browsers in 2009, and was later ported to the iPad (running iOS) in 2011, with several added features.

[1] Reviewers noted the game's especially short duration, memorability, art style, and emphasis on exploration over problem solving.

[7] Patrick Smith, a Brooklyn-based artist,[8] drew, animated, and programmed Windosill by himself[9] for Microsoft Windows, OS X, Linux, web browser, and iPad (iOS) platforms.

[8] Although Edge previously covered and praised Smith's prior work, they wrote that he "is notable for never having made the jump to the mainstream".

[11] Smith first sketched Windosill level ideas in pencil, and transferred his favorites into Adobe Illustrator, where he added detail, "shapes and colors".

[8] Smith's main inspirations when creating Windosill were mainly artists and not games: surrealists René Magritte and Joan Miró, metaphysical painter Giorgio de Chirico, animators Max and Dave Fleischer of Fleischer Studios, cartoonists Chris Ware and Jim Woodring, sculptor Alexander Calder, and Italian Renaissance painters Paolo Uccello and Piero della Francesca.

[8] An iOS (iPad-only[7]) port[6] was released on December 15, 2011,[4] and added two features: Complex Gravity (which adds "tilt controls") and See-Thru[6] (which makes the room's elements transparent).

[4][5][6][8] Nissa Campbell of TouchArcade described the style as "surreal",[6] and Tim Rattray of Slide to Play wrote that Windosill is "serious" in its attempt to "be 'art'".

[4] He described the puzzle design and production value as "brilliant", and praised the "fitting" sound effects, "smooth" controls, and "perfect" frame rate.